By vikino - 3/10/2024 12:08:26 PM
Any news on this?
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By Bouwair - 4/25/2024 12:12:20 PM
Hello Tim, Maybe not a lot of people are mentioning this, but i think a lot of people would like to have this. We would like the options for the G5 the gamin auto pilot and the AT-1 together with the setup for the radio.
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By vikino - 4/25/2024 5:06:31 PM
+xHello Tim, Maybe not a lot of people are mentioning this, but i think a lot of people would like to have this. We would like the options for the G5 the gamin auto pilot and the AT-1 together with the setup for the radio.
That exactly what i think too, and what i want to get...Then you dont have to feed g5 or any AP with gps like garmin aera...
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By Tim Dawson - 5/22/2024 1:36:08 PM
Would you expect SkyDemon to send GPRMB sentences only, or also synthesize GPRMC sentences and similar?
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By vikino - 5/27/2024 11:27:45 AM
+xWould you expect SkyDemon to send GPRMB sentences only, or also synthesize GPRMC sentences and similar? Wozld be great to have GPRMC too
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By vikino - 5/27/2024 9:23:18 PM
+xWould you expect SkyDemon to send GPRMB sentences only, or also synthesize GPRMC sentences and similar? GPRMC, GPRMB, GPGGA, and one of GPBOD or GPAPB
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By Tim Dawson - 5/28/2024 9:09:41 AM
That makes life harder, because usually we do not even have access to raw GPS sentences, so we would need to be creating those messages with synthesized information. Please email us through the contact form on our website, and ask for it to be forwarded to me, and we can continue this discussion offline. In due course I'll be able to make a beta available to you for testing purposes.
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By vikino - 7/30/2024 3:00:56 PM
+xHow strange that now we're focusing on exactly this development, nobody in this thread wishes to help. Hello tim, i did not received topic notifications, will dm you
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By vikino - 8/5/2024 4:21:43 PM
+x+xFrom what I've heard, people drive their Skyview autopilot from the Skyview itself, having transferred the SkyDemon route on to it.
I do not know that the Skyview autopilot can be disconnected from the Skyview and given commands by other software, but if it can, and it accepts those commands via RS232, then our solution might work. Yes, you send the SD route to SV via wifi connection from SV then, once on SV, it can drive autopilot etc. but what I'm referring to is effectively using SD as a navigation source into SV so any changes made in SD would be reflected real-time in SV. Perhaps my confusion but that is what I understood the BT connectivity would enable? Hi, SV is intended to use internal SV maps to drive AP, i have to look into manuals if it is possible to drive SV AP over RS232. This what will be in SD is meant to drive older Dynon APs, as well as Garmin AP with G5, stand-alone autopilots. There it will work real-time.
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By ph-crj - 8/20/2024 4:30:15 PM
Hi, I tested it today with this equipment: VAN's RV6 experimental, iPad mini 6, Skydemon 4.0.0.397, Blutooth->RS232 Adapter Bt578v3, TRIO Autopilot. It works perfectly !! :-)
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By mbechc - 8/21/2024 7:31:05 AM
I would like to sign up as beta tester if needed.
I have the Skyview Radio panel which is useless in Denmark with all our small grass-strips (Half the flying time is spend rotating for new freq) - I would simply be overjoyed to have Skydemon able to transmit frequencies to the remote radio unit and put tape over the Dynon radio panel. You just smashed it with this feature....
Secondly I transmit routes from Skydemon to FPL inside Skyview, but having the servoes run by Skydemon is also extremely valuable. The last stretch were we get landing information and select the landing pattern in Skydemon can now be flown by autopilot controlled by Skydemon as I seldom have time to transmit FLP to Skyview and select the right leg inside FPL menu in Skyview - this is also a killer feature.
Wow just wow I have bought the serial adaptor and are ready to test
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By Tim Dawson - 8/21/2024 9:17:31 AM
No need for more beta testing of these features as they went live earlier this week in our new version. SkyDemon 4 is out now and it includes sending of frequencies to radios, and course data to autopilots.
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By Bouwair - 8/21/2024 9:25:53 PM
Can anyone put some electrical drawings here for connecting a trig radio and a Garmin G5 and the Bluetooth->RS232 Adapter Bt578v3
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By Tim Dawson - 8/22/2024 8:20:06 AM
Do you need further information than what's in the user manual?
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By Tim Dawson - 6/12/2024 8:55:23 AM
How strange that now we're focusing on exactly this development, nobody in this thread wishes to help.
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By I_Need_Help - 8/22/2024 7:11:07 PM
Hi @Tim and everyone,
I'm working on building a Bluetooth to CAN bus interface and transforming the message, which isn't too challenging. However, as an iPhone user, I'm running into difficulties connecting to SkyDemon from a Bluetooth-enabled microcontroller.
My main question is: When SkyDemon starts scanning for devices, what exactly is it looking for? Is it expecting an RFCOMM or SPP connection via Classic Bluetooth, assumingly as a server? Or is it scanning for a specific GATT using BLE? It would be really helpful if someone familiar with the scanning and connection code in SkyDemon could clarify this.
Additionally, I've ordered one of the standalone converters that were mentioned earlier. Once it arrives, what configuration is necessary for it to connect properly?
Thanks in advance for any guidance!
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By Tim Dawson - 8/23/2024 9:30:52 AM
SkyDemon uses Bluetooth low energy (BLE). There's no pairing process, there's no SPP, it requires pretty much no configuration, so it's very easy.
BLE to RS232 has a defined service and characteristic UUID (one for each) which you should be able to find online.
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By Bouwair - 8/25/2024 9:36:33 PM
+xDo you need further information than what's in the user manual? Sorry, Did not read the latest manual
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By tmn_pilot - 8/26/2024 10:12:59 AM
Hi all
Great feature :-)
Can anyone confirm it is working on android devices?
I've tried on 3 different devices with different BLE versions, and SD were not able to discover any of my BLE devices.
Thomas
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By aerobatics500 - 8/26/2024 5:39:26 PM
+xHi, I tested it today with this equipment: VAN's RV6 experimental, iPad mini 6, Skydemon 4.0.0.397, Blutooth->RS232 Adapter Bt578v3, TRIO Autopilot. It works perfectly !! :-)
Can you please post make and model of the bluetooth adapter. I purchased a BT578V3 and it doesn't work with IOS.
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By ph-crj - 8/26/2024 8:04:47 PM
+xCan you please post make and model of the bluetooth adapter. I purchased a BT578V3 and it doesn't work with IOS. It don*t work with IOS, it work with skydemon on IOS !!! :-) You can not find a BLE-Device with native IOS. You must find and add it from Skydemon. (read Manual)
The IOS APP "Lightblue" can show BLE-Devices nearby (like Apple Airtags) Achim PS: I ordered my Bt578v3 from Aliexpress (found via google)
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By Laycom - 8/26/2024 8:12:27 PM
I have connected a DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART module and can receive the "COM setting data" via RS232. This works really well.
Is there a list of supported radios and their data format? Now I'm faced with the problem of wanting to control a Becker AR 6201 radio. It has an RS-422 interface. It shouldn't be a problem to convert RS232 to RS422, but the data format is unknown. Can anyone help?
Thanks in advance Michael
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By Tim Dawson - 8/27/2024 8:59:31 AM
SkyDemon works great with BLE devices on iOS and Android, it has been tested extensively on both using the BT578 but others should work the same.
We don't have a list of radios that support the Garmin protocol that we use. Trig are definitely included.
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By Laycom - 8/27/2024 5:38:14 PM
+xSkyDemon works great with BLE devices on iOS and Android, it has been tested extensively on both using the BT578 but others should work the same.
We don't have a list of radios that support the Garmin protocol that we use. Trig are definitely included. Is there a documentation of the used Garmin protocol? As already mentioned, I would like to control a Becker AR6201. If it is a GARMIN protocol, can you also control a GNS 430 / 530 with it? Are there any experiences?
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By Tim Dawson - 8/28/2024 8:57:48 AM
Yes there is documentation out there. Search for Garmin GTR 225 installation manual and look for the PGRMC NMEA sentence.
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By vikino - 8/28/2024 12:25:15 PM
+x+xCan you please post make and model of the bluetooth adapter. I purchased a BT578V3 and it doesn't work with IOS. It don*t work with IOS, it work with skydemon on IOS !!! :-) You can not find a BLE-Device with native IOS. You must find and add it from Skydemon. (read Manual)
The IOS APP "Lightblue" can show BLE-Devices nearby (like Apple Airtags) Achim PS: I ordered my Bt578v3 from Aliexpress (found via google)
It works with iOS, tested with iPhone, iPad, as well Android devices, tablets, phones, 578 v3 without any single issue... Is your 578 correctly configured? It can me configured via RS232 from PC...
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By ph-crj - 8/28/2024 1:46:20 PM
+xIt works with iOS, tested with iPhone, iPad, as well Android devices, tablets, phones, 578 v3 without any single issue... Is your 578 correctly configured? It can me configured via RS232 from PC...
Yesterday my perfekt working installation went crasy. :-( The TRIO Pro Pilot only accepted the tracking Signal for a few 10 minutes. After resetting all in flight, the Autopilot tries to navigate me in the wrong direction. After another 10 minutes it lose again the Signal. The route was a "Reversed" original Route (back from Helgoland to Hildesheim)(PH-CRJ in FR24)
I will try it again next week. Achim
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By Kilo Lima - 8/28/2024 5:00:33 PM
Hi,
I’m wondering where you connect the 5v supply for the Bluetooth module in your aircraft?
Thanks!
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By grahamb - 8/28/2024 5:10:57 PM
+x+xIt works with iOS, tested with iPhone, iPad, as well Android devices, tablets, phones, 578 v3 without any single issue... Is your 578 correctly configured? It can me configured via RS232 from PC...
Yesterday my perfekt working installation went crasy. :-( The TRIO Pro Pilot only accepted the tracking Signal for a few 10 minutes. After resetting all in flight, the Autopilot tries to navigate me in the wrong direction. After another 10 minutes it lose again the Signal. The route was a "Reversed" original Route (back from Helgoland to Hildesheim)(PH-CRJ in FR24)
I will try it again next week. Achim
Caveat all those who wish to hand over control of an aircraft to uncertified avionics and software running on consumer electronics devices.
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By Laycom - 8/28/2024 6:26:11 PM
+xYes there is documentation out there. Search for Garmin GTR 225 installation manual and look for the PGRMC NMEA sentence. Got it. Thanks.
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By davemg - 8/29/2024 8:36:03 AM
I got a IRXON BT578 v3 and can connect to it with Skydemon. Tim, is it possible to make a change to allow both sending frequency to a radio and receiving GPS/Traffic using the same device?
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By Tim Dawson - 8/29/2024 8:53:45 AM
Maybe in the future. These things only cost around £15, so for the time being, just use more than one.
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By ph-crj - 8/29/2024 9:57:34 AM
+xCaveat all those who wish to hand over control of an aircraft to uncertified avionics and software running on consumer electronics devices. I have an uncertified engine and the uncertfied Version of the Garmin G5. My plane is an "Experimental" homemade RV6. ;-) I always have to be prepared, that the engine fall of the plane.... That is why skydemon refers to Avionics Engineers.
and
That is why it's good to be a certified pilot. Achim
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By I_Need_Help - 8/29/2024 9:08:32 PM
+xSkyDemon uses Bluetooth low energy (BLE). There's no pairing process, there's no SPP, it requires pretty much no configuration, so it's very easy.
BLE to RS232 has a defined service and characteristic UUID (one for each) which you should be able to find online. Thanks Tim
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By aerobatics500 - 8/31/2024 8:27:16 AM
Hi,
has anyone tested it with a TruTrak AP? It requires NMEA0183 format.
regards Georg
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By PaulSS - 8/31/2024 8:35:48 AM
Since the Bluetooth to RS232 converter is accessed via SkyDemon, does that mean it is still possible to pair other devices with the Bluetooth function of an iPad? I'm thinking of something like sending the route to an autopilot (connected through SkyDemon) and having the iPad connected to a headset with Bluetooth connectivity (for SkyDemon audio) using the normal Bluetooth function.
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By aerobatics500 - 8/31/2024 1:18:28 PM
+xSince the Bluetooth to RS232 converter is accessed via SkyDemon, does that mean it is still possible to pair other devices with the Bluetooth function of an iPad? I'm thinking of something like sending the route to an autopilot (connected through SkyDemon) and having the iPad connected to a headset with Bluetooth connectivity (for SkyDemon audio) using the normal Bluetooth function. I have two bluetooth devices already connected to Skydemon. One for the AP and one for the Radio.
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By Kilo Lima - 9/3/2024 9:09:19 PM
+x+x+xHi,
I’m wondering where you connect the 5v supply for the Bluetooth module in your aircraft?
Thanks! Any idea please? Thanks for your help! That will depend on your aircraft type and what rules you operate under e,.g. certified, LAA or BMAA It’s a non certified aircraft equipped with a Rotax 912 engine. Easy to do some modifications under French experimental rules.
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By Kilo Lima - 9/3/2024 9:11:38 PM
+x+x+xHi,
I’m wondering where you connect the 5v supply for the Bluetooth module in your aircraft?
Thanks! Any idea please? Thanks for your help! That will depend on your aircraft type and what rules you operate under e,.g. certified, LAA or BMAA It’s an Experimental aircraft equipped with a Rotax 912. Easy to do some modifications under French rules. Thanks
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By Kilo Lima - 9/3/2024 9:14:07 PM
It’s a French experimental equipped with a Rotax 912. Easy to do some modifications under this French rules. Thanks
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By I_Need_Help - 9/4/2024 11:01:15 AM
I have had good results with these in past https://www.ebay.co.uk/itm/193552404580?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=UdLxmPhjSYW&sssrc=4429486&ssuid=M5gVARi1SJS&var=493775050618&widget_ver=artemis&media=COPY
Also many people also fit a 12v socket and use a car usb adaptor but get a good make or you may get noise!
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By Kilo Lima - 9/4/2024 3:24:23 PM
Ok, thank you for your help. I will investigate for a converter.
I think this is the only way to supply 5v to the Bluetooth module.
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By Kilo Lima - 9/4/2024 3:29:12 PM
Or perhaps it’s possible to find a 12v Bluetooth module????
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By bsdchapman - 9/14/2024 10:51:58 AM
+xI have connected a DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART module and can receive the "COM setting data" via RS232. This works really well.
Is there a list of supported radios and their data format? Now I'm faced with the problem of wanting to control a Becker AR 6201 radio. It has an RS-422 interface. It shouldn't be a problem to convert RS232 to RS422, but the data format is unknown. Can anyone help?
Thanks in advance Michael Michael, I'm trying to prevent the back of my panel looking like a PAW Classic... these wee units look far better for mounting. Can you confirm that they can output RS232 sentances for avionics? Are any resistors needed?
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By jekroth - 9/19/2024 9:04:27 PM
+xWell...
I have tested theese BT-RS232 modules a lot by my self, it works great with Dynon EFIS-D100 + AP74 autopilot and Trig TY96 COM radio, also without any issue with KRT2 COM radio. You just need to "match" baudrate to 4800 or 9600bps, that should do in this case SkyDemon, afterwards it works like a charm, no drop outs with Samsung tablets or my phone Samsung S23 Ultra. And all another BT to RS232 work in the same way like this one, all are in the phone as bluetooth com port, all this seems to me much easier and more stable than 3rd party devices which are connected over wifi. Not talking about that you kill your internal data sim when connected to wifi of "ADAHRS" and so on...
This will just work perfectly.
Btw., with this, you can go to compleete system, because when you connect to this serial converter also Garrecht TRX1500 (for example), you can use SkyDemon as traffic display - by using GTX TIS protocol over that single BT-RS232 module. In the same way i have it with Garmin AERA 760, but planning a route is terrible on that device, but Garmin has built in RS232...
+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. I have now flown a bit with both radio and autopilot connected to each blue tooth unit, and it works perfectly. My experience is that it is easy to accidentally press a new radio frequency if the air is bumpy, so I have chosen that they end up in standby mode, therefore a request for a button to switch standby/active in skydemon, also a numeric keyboard in the radio tab would be good. the auto pilot has everything I could wish for
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By moefly - 9/22/2024 4:55:46 PM
All,
I was very excited when I read about the feature in the Skydemon release note, went right into ordering parts and figured I share the experience here.
Top 1 priority for me was to get the radio (f.u.n.k.e. ATR833-II) connected. So I designed a 3d case that perfectly fits on top of the original Sub-D connector housing and uses the existing screw holes (only needed slightly longer screws). Once mounted, it sits below the connector at the back of the radio and doesn't block anything else / basically uses the same space.
I decided to use a HM-18 BLE to serial module. It is very power efficient and therefore I could easily use the 5V the radio provides on the Sub-D connector. The HM-18 is outputting TTL serial, hence I added a MAX3232 converter to provide the proper RS232 levels the radio expects.
Put everything together and it worked right away. For me it's almost a killer feature in Skydemon as it makes my life so much more simple during flight. A big thx to Tim and his team for adding this feature!
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By Tim Dawson - 9/24/2024 10:16:43 AM
Nicely done!
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By vikino - 9/24/2024 5:35:42 PM
Hello Tim, have you got any time schedule about programming ability to send AP+COM and receive traffic via single BT-RS232? Just to know if i should wire second BT device or you can get it to work in near future?
Vitek
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By Tim Dawson - 9/25/2024 10:23:55 AM
I can't commit to a time schedule, sorry. I need to re-engineer part of the Bluetooth stack before it will be practical, and that could be weeks or months.
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By Kilo Lima - 9/25/2024 7:44:55 PM
+xI can't commit to a time schedule, sorry. I need to re-engineer part of the Bluetooth stack before it will be practical, and that could be weeks or months. Hi Tim,
What feature can we expect regarding the traffic? For example : To send the traffic received from Safesky in SkyDemon to a Dynon Skyview (with a Bluetooth module connected)?
Thanks.
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By Tim Dawson - 9/26/2024 9:51:37 AM
You can connect a FLARM traffic receiver to SkyDemon via Bluetooth so that the traffic it receives is displayed in SkyDemon. That's the only relationship between traffic and Bluetooth.
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By Kilo Lima - 9/27/2024 10:12:51 PM
+xYou can connect a FLARM traffic receiver to SkyDemon via Bluetooth so that the traffic it receives is displayed in SkyDemon. That's the only relationship between traffic and Bluetooth. Thank you Tim.
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By AlexLFDP - 10/3/2024 7:02:09 AM
Hi all
If anybody is connecting the BT receiver to the TruTrak 385 autopilot, I would be interested to hear. It's currently getting GPS feed from an old and useless AvMap Geo Pilot II+ that I would like to replace It seems that it may need engineer from avionics specialist but I would like to do it myself (flying non certified) because from what I see on Skydemon manual, it seems pretty simple. Pins connecting to Ground on both side, Rx Pin on autopilot connecting to Tx on BT receiver. On Irxon BT578, pin 5 is Gd and 3 is Tx, and it can't be rewired. So it probably means to create a RS232 cable if rewired is needed on autopilot RS232. It may be better anyway to avoid plugging the BT receiver directly to the avionics (thinking that it may be a pain if anything has to be done on the receiver if not easily accessible). Any recommandation on the type of wire/cable to be used if needed (shield?)
thanks
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By tobi - 10/11/2024 5:18:54 AM
+xAll,
I was very excited when I read about the feature in the Skydemon release note, went right into ordering parts and figured I share the experience here.
Top 1 priority for me was to get the radio (f.u.n.k.e. ATR833-II) connected. So I designed a 3d case that perfectly fits on top of the original Sub-D connector housing and uses the existing screw holes (only needed slightly longer screws). Once mounted, it sits below the connector at the back of the radio and doesn't block anything else / basically uses the same space.
I decided to use a HM-18 BLE to serial module. It is very power efficient and therefore I could easily use the 5V the radio provides on the Sub-D connector. The HM-18 is outputting TTL serial, hence I added a MAX3232 converter to provide the proper RS232 levels the radio expects.
Put everything together and it worked right away. For me it's almost a killer feature in Skydemon as it makes my life so much more simple during flight. A big thx to Tim and his team for adding this feature!
Hi moefly,
according to HM-18 datasheet the power supply voltage is from 1.9V to 3.7V. The ATR833 has 5V output. Do you use a voltage converter or do you just run out of specs?
Regards, Tobi
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By Pascal - 10/16/2024 4:54:09 PM
+x+xCan anyone confirm if the available protocols work with a Becker AR6201, and they have it working. No, it will not work by default.
First, some words about TTL and V24. The mentioned working transceivers (Garmin GTR 225, f.u.n.k.e. ATR833-II, Trig TY 91/96) have a RS-232 interface with V24 voltage level. This means serial transmission with logical low at -12V and high at +12 V (nearly...). The cheap BT-Modules (which work like a charm with the iPad) have TTL voltage level. (low at 0 V , high at + 5V). To connect it to your RS-232 transceiver you need a voltage level converter.
Something like this:
Now to Becker. The AR6201 has an RS-422 interface. RS-422 is electrically different to RS-232 (4 lines, current driven). But it isn't the main problem, there are many converter from TTL to RS-422 available.
The challenge is the implementation of a translator from NMEA (ASCII) PGRMC sentences to the in-house Becker protocol. I found an Open Source solution used in the LK8000:
There should be any information needed for such a piece of software... I can't wait to try it out when I can have an AR6201 outside of the plane.
Hello , i have spent some time trying the Irxon bluetooth dongle with an rs 485/422 converter wired up to my Becker Ar6201 (rx2+ to pin 2 tx 2+, tx2+ to pin 3 rx2+,rx2- to pin 9 tx2-, tx2- to pin 10 rx2-, pin 23 ground) .The dongle is recognized by skydemon, the chosen frequency is described as being sent but none of the radio settings in the Skydemon list (garmin,funke..)produces any result. The tandem box in the internal menu of the becker is checked on so it should recognize a remote. If have seen youtube videos of the radio accepting frequency changes from a
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By Laycom - 10/16/2024 7:52:23 PM
+x+x+xCan anyone confirm if the available protocols work with a Becker AR6201, and they have it working. No, it will not work by default.
First, some words about TTL and V24. The mentioned working transceivers (Garmin GTR 225, f.u.n.k.e. ATR833-II, Trig TY 91/96) have a RS-232 interface with V24 voltage level. This means serial transmission with logical low at -12V and high at +12 V (nearly...). The cheap BT-Modules (which work like a charm with the iPad) have TTL voltage level. (low at 0 V , high at + 5V). To connect it to your RS-232 transceiver you need a voltage level converter.
Something like this:
Now to Becker. The AR6201 has an RS-422 interface. RS-422 is electrically different to RS-232 (4 lines, current driven). But it isn't the main problem, there are many converter from TTL to RS-422 available.
The challenge is the implementation of a translator from NMEA (ASCII) PGRMC sentences to the in-house Becker protocol. I found an Open Source solution used in the LK8000:
There should be any information needed for such a piece of software... I can't wait to try it out when I can have an AR6201 outside of the plane.
Hello , i have spent some time trying the Irxon bluetooth dongle with an rs 485/422 converter wired up to my Becker Ar6201 (rx2+ to pin 2 tx 2+, tx2+ to pin 3 rx2+,rx2- to pin 9 tx2-, tx2- to pin 10 rx2-, pin 23 ground) .The dongle is recognized by skydemon, the chosen frequency is described as being sent but none of the radio settings in the Skydemon list (garmin,funke..)produces any result. The tandem box in the internal menu of the becker is checked on so it should recognize a remote. If have seen youtube videos of the radio accepting frequency changes from a As I mentioned before, Becker has its own protocol, nothing like NMEA (ASCII) PGRMC sets. You need to translate the output/input into Becker language. A separate controller with translation software is required. Even if you can communicate with the AR6201 via a converter (RS-232 <-> RS-422), the device does not understand the commands.I'm working on it. Please confirm that you are interested in a solution. The more interested parties, the better.
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By Pascal - 10/17/2024 3:06:44 PM
+x+x+x+xCan anyone confirm if the available protocols work with a Becker AR6201, and they have it working. No, it will not work by default.
First, some words about TTL and V24. The mentioned working transceivers (Garmin GTR 225, f.u.n.k.e. ATR833-II, Trig TY 91/96) have a RS-232 interface with V24 voltage level. This means serial transmission with logical low at -12V and high at +12 V (nearly...). The cheap BT-Modules (which work like a charm with the iPad) have TTL voltage level. (low at 0 V , high at + 5V). To connect it to your RS-232 transceiver you need a voltage level converter.
Something like this:
Now to Becker. The AR6201 has an RS-422 interface. RS-422 is electrically different to RS-232 (4 lines, current driven). But it isn't the main problem, there are many converter from TTL to RS-422 available.
The challenge is the implementation of a translator from NMEA (ASCII) PGRMC sentences to the in-house Becker protocol. I found an Open Source solution used in the LK8000:
There should be any information needed for such a piece of software... I can't wait to try it out when I can have an AR6201 outside of the plane.
Hello , i have spent some time trying the Irxon bluetooth dongle with an rs 485/422 converter wired up to my Becker Ar6201 (rx2+ to pin 2 tx 2+, tx2+ to pin 3 rx2+,rx2- to pin 9 tx2-, tx2- to pin 10 rx2-, pin 23 ground) .The dongle is recognized by skydemon, the chosen frequency is described as being sent but none of the radio settings in the Skydemon list (garmin,funke..)produces any result. The tandem box in the internal menu of the becker is checked on so it should recognize a remote. If have seen youtube videos of the radio accepting frequency changes from a As I mentioned before, Becker has its own protocol, nothing like NMEA (ASCII) PGRMC sets. You need to translate the output/input into Becker language. A separate controller with translation software is required. Even if you can communicate with the AR6201 via a converter (RS-232 <-> RS-422), the device does not understand the commands. I'm working on it. Please confirm that you are interested in a solution. The more interested parties, the better.
Becker does offer its own rs232 to rs 422 converter (available for 180£ from Mendelsson…) I don’t know if this includes a “translator” inside. There are a least 2 pilots in my club who would be interested in a solution but we are both useless at programing😇
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By Pascal - 10/17/2024 3:10:02 PM
+x+x+x+xCan anyone confirm if the available protocols work with a Becker AR6201, and they have it working. No, it will not work by default.
First, some words about TTL and V24. The mentioned working transceivers (Garmin GTR 225, f.u.n.k.e. ATR833-II, Trig TY 91/96) have a RS-232 interface with V24 voltage level. This means serial transmission with logical low at -12V and high at +12 V (nearly...). The cheap BT-Modules (which work like a charm with the iPad) have TTL voltage level. (low at 0 V , high at + 5V). To connect it to your RS-232 transceiver you need a voltage level converter.
Something like this:
Now to Becker. The AR6201 has an RS-422 interface. RS-422 is electrically different to RS-232 (4 lines, current driven). But it isn't the main problem, there are many converter from TTL to RS-422 available.
The challenge is the implementation of a translator from NMEA (ASCII) PGRMC sentences to the in-house Becker protocol. I found an Open Source solution used in the LK8000:
There should be any information needed for such a piece of software... I can't wait to try it out when I can have an AR6201 outside of the plane.
Hello , i have spent some time trying the Irxon bluetooth dongle with an rs 485/422 converter wired up to my Becker Ar6201 (rx2+ to pin 2 tx 2+, tx2+ to pin 3 rx2+,rx2- to pin 9 tx2-, tx2- to pin 10 rx2-, pin 23 ground) .The dongle is recognized by skydemon, the chosen frequency is described as being sent but none of the radio settings in the Skydemon list (garmin,funke..)produces any result. The tandem box in the internal menu of the becker is checked on so it should recognize a remote. If have seen youtube videos of the radio accepting frequency changes from a As I mentioned before, Becker has its own protocol, nothing like NMEA (ASCII) PGRMC sets. You need to translate the output/input into Becker language. A separate controller with translation software is required. Even if you can communicate with the AR6201 via a converter (RS-232 <-> RS-422), the device does not understand the commands. I'm working on it. Please confirm that you are interested in a solution. The more interested parties, the better.
What shape or form would a Becker “Translator” take? Lines of code from Skydemon or a third-party device inserted in the chain between bluetooth dongle,converter and radio? Just curious.The question might sound stupid but I am more at home with engines and wiring
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By Laycom - 10/17/2024 7:09:35 PM
+x+x+x+x+xCan anyone confirm if the available protocols work with a Becker AR6201, and they have it working. No, it will not work by default.
First, some words about TTL and V24. The mentioned working transceivers (Garmin GTR 225, f.u.n.k.e. ATR833-II, Trig TY 91/96) have a RS-232 interface with V24 voltage level. This means serial transmission with logical low at -12V and high at +12 V (nearly...). The cheap BT-Modules (which work like a charm with the iPad) have TTL voltage level. (low at 0 V , high at + 5V). To connect it to your RS-232 transceiver you need a voltage level converter.
Something like this:
Now to Becker. The AR6201 has an RS-422 interface. RS-422 is electrically different to RS-232 (4 lines, current driven). But it isn't the main problem, there are many converter from TTL to RS-422 available.
The challenge is the implementation of a translator from NMEA (ASCII) PGRMC sentences to the in-house Becker protocol. I found an Open Source solution used in the LK8000:
There should be any information needed for such a piece of software... I can't wait to try it out when I can have an AR6201 outside of the plane.
Hello , i have spent some time trying the Irxon bluetooth dongle with an rs 485/422 converter wired up to my Becker Ar6201 (rx2+ to pin 2 tx 2+, tx2+ to pin 3 rx2+,rx2- to pin 9 tx2-, tx2- to pin 10 rx2-, pin 23 ground) .The dongle is recognized by skydemon, the chosen frequency is described as being sent but none of the radio settings in the Skydemon list (garmin,funke..)produces any result. The tandem box in the internal menu of the becker is checked on so it should recognize a remote. If have seen youtube videos of the radio accepting frequency changes from a As I mentioned before, Becker has its own protocol, nothing like NMEA (ASCII) PGRMC sets. You need to translate the output/input into Becker language. A separate controller with translation software is required. Even if you can communicate with the AR6201 via a converter (RS-232 <-> RS-422), the device does not understand the commands. I'm working on it. Please confirm that you are interested in a solution. The more interested parties, the better.
Becker does offer its own rs232 to rs 422 converter (available for 180£ from Mendelsson…) I don’t know if this includes a “translator” inside. There are a least 2 pilots in my club who would be interested in a solution but we are both useless at programing😇 I would guess it's only the hardware converter (on ebay a few bugs). The newly emerged problem with the PGRMC sentences is also new for Becker.
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By Laycom - 10/17/2024 7:28:49 PM
+x+x+x+x+xCan anyone confirm if the available protocols work with a Becker AR6201, and they have it working. No, it will not work by default.
First, some words about TTL and V24. The mentioned working transceivers (Garmin GTR 225, f.u.n.k.e. ATR833-II, Trig TY 91/96) have a RS-232 interface with V24 voltage level. This means serial transmission with logical low at -12V and high at +12 V (nearly...). The cheap BT-Modules (which work like a charm with the iPad) have TTL voltage level. (low at 0 V , high at + 5V). To connect it to your RS-232 transceiver you need a voltage level converter.
Something like this:
Now to Becker. The AR6201 has an RS-422 interface. RS-422 is electrically different to RS-232 (4 lines, current driven). But it isn't the main problem, there are many converter from TTL to RS-422 available.
The challenge is the implementation of a translator from NMEA (ASCII) PGRMC sentences to the in-house Becker protocol. I found an Open Source solution used in the LK8000:
There should be any information needed for such a piece of software... I can't wait to try it out when I can have an AR6201 outside of the plane.
Hello , i have spent some time trying the Irxon bluetooth dongle with an rs 485/422 converter wired up to my Becker Ar6201 (rx2+ to pin 2 tx 2+, tx2+ to pin 3 rx2+,rx2- to pin 9 tx2-, tx2- to pin 10 rx2-, pin 23 ground) .The dongle is recognized by skydemon, the chosen frequency is described as being sent but none of the radio settings in the Skydemon list (garmin,funke..)produces any result. The tandem box in the internal menu of the becker is checked on so it should recognize a remote. If have seen youtube videos of the radio accepting frequency changes from a As I mentioned before, Becker has its own protocol, nothing like NMEA (ASCII) PGRMC sets. You need to translate the output/input into Becker language. A separate controller with translation software is required. Even if you can communicate with the AR6201 via a converter (RS-232 <-> RS-422), the device does not understand the commands. I'm working on it. Please confirm that you are interested in a solution. The more interested parties, the better.
What shape or form would a Becker “Translator” take? Lines of code from Skydemon or a third-party device inserted in the chain between bluetooth dongle,converter and radio? Just curious.The question might sound stupid but I am more at home with engines and wiring Well, it depends ;-)) If Skydemon could add this type of device in his software it would be the smartest solution. Tim, are you listening?
If not, there is a piece of hardware needed. At one end the BT-Dongle, in between a small microcontroller with the translator and at the other end a RS-422 interface. This unit could be shrinked down to the size of a matchbox.
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By Tim Dawson - 10/18/2024 8:42:53 AM
Yes, we are willing to add support for Becker radios if someone can help us with the protocol and testing of the feature. Just get in touch with me via customer support (Michael) and we can talk about it.
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By Laycom - 11/4/2024 10:08:30 PM
+xYes, we are willing to add support for Becker radios if someone can help us with the protocol and testing of the feature. Just get in touch with me via customer support (Michael) and we can talk about it. For everyone waiting for a solution for Becker AR620X: Yes, there is progress. The translator solution already works, but there will also be a solution from Tim without a translator. Stay tuned.
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By jekroth - 11/15/2024 3:07:38 PM
+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. Hello I have connected 1 bluetooth device to Funke radio and Dynon autopilot. It works great with Android but doesn't work with iPhone. With iphone you have to choose radio or Ap. Did we miss something or does it not work to control both with the iPhone. Is there anything that solves this? or should I mount 2 bluetooth units one yill radio and the other for AP
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By Laycom - 11/16/2024 6:03:54 PM
Thanks to Tim there is now an Android beta with support of the Becker AR6201 protocol.
Here is my solution to connect a BLE device to the Becker AR6201 radio:
Bill of material:
DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART Modul mit 4 PIN Base Board für Arduino UNO R3 Mega 2560 Nano
RS422 MAX490 Mutual Transfer Full-duplex TTL Bi-directional Signal Module DC 5V
AMS1117 DC-DC Step Down Voltage Converter 6V - 12V to 5V
Minifuse 125 mA
My BLE to AR620x housing Please contact me for STL-files, if needed.
The schematic of the circuit is attached.
Please note this is only for 12 V bus voltage, and ONLY for experimental use!!!
Cheers!
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By norland - 11/18/2024 1:47:09 PM
Excellent to see support coming for the Becker, Winter project ahead! Well done for the work tracking down the protocol.
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By flying_john - 11/18/2024 6:29:58 PM
When this is used to send a frequency(channel) to the radio, how do you choose between standby or active frequency when you choose a new frequency in SD.
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By Laycom - 11/18/2024 8:29:57 PM
+xWhen this is used to send a frequency(channel) to the radio, how do you choose between standby or active frequency when you choose a new frequency in SD.
When setting up a new BLE device, you need to select the function you want to control. Autopilot, radio or whatever comes next. If you select radio you can determine whether you want to set the active or standby frequency. I prefer to set the standby frequency. You can set it via the tablet, check it again and then activate it manually. I hope this helps.
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By Laycom - 11/18/2024 8:44:51 PM
+x+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. Hello I have connected 1 bluetooth device to Funke radio and Dynon autopilot. It works great with Android but doesn't work with iPhone. With iphone you have to choose radio or Ap. Did we miss something or does it not work to control both with the iPhone. Is there anything that solves this? or should I mount 2 bluetooth units one yill radio and the other for AP
I'm not sure I understood you correctly, you only connected ONE bluetooth device to the Funke radio AND to the Dynon autopilot? How did you do that?
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By vikino - 11/23/2024 11:20:57 AM
+x+x+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. Hello I have connected 1 bluetooth device to Funke radio and Dynon autopilot. It works great with Android but doesn't work with iPhone. With iphone you have to choose radio or Ap. Did we miss something or does it not work to control both with the iPhone. Is there anything that solves this? or should I mount 2 bluetooth units one yill radio and the other for AP
I'm not sure I understood you correctly, you only connected ONE bluetooth device to the Funke radio AND to the Dynon autopilot? How did you do that? Yes, i have on one IRXON Trig radio and Dynon AP... Just use the same RS232 wire for both...
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By Laycom - 11/23/2024 3:10:34 PM
+x+x+x+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. Hello I have connected 1 bluetooth device to Funke radio and Dynon autopilot. It works great with Android but doesn't work with iPhone. With iphone you have to choose radio or Ap. Did we miss something or does it not work to control both with the iPhone. Is there anything that solves this? or should I mount 2 bluetooth units one yill radio and the other for AP
I'm not sure I understood you correctly, you only connected ONE bluetooth device to the Funke radio AND to the Dynon autopilot? How did you do that? Yes, i have on one IRXON Trig radio and Dynon AP... Just use the same RS232 wire for both... Well, RS232 is defined as a bidirectional point-to-point connection. If you only send in one direction, this is possible. This workaround is called multidrop. This only works if there is ONE transmitter and multiple receivers. The recipients all receive the same data packets and discard those they do not understand. As soon as the receivers also have to react, this concept with RS232 fails. Devices transmitting at the same time lead to collisions. The transmission becomes unreadable. I believe SD has only sent over BLE so far. Some devices, e.g. the Becker AR6201 also need to send data to SD, and then multidrop will fail. I assume that each controlled device has to use its own BLE. Maybe Tim can say something about that?
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By vikino - 11/24/2024 1:43:26 PM
+x+x+x+x+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. Hello I have connected 1 bluetooth device to Funke radio and Dynon autopilot. It works great with Android but doesn't work with iPhone. With iphone you have to choose radio or Ap. Did we miss something or does it not work to control both with the iPhone. Is there anything that solves this? or should I mount 2 bluetooth units one yill radio and the other for AP
I'm not sure I understood you correctly, you only connected ONE bluetooth device to the Funke radio AND to the Dynon autopilot? How did you do that? Yes, i have on one IRXON Trig radio and Dynon AP... Just use the same RS232 wire for both... Well, RS232 is defined as a bidirectional point-to-point connection. If you only send in one direction, this is possible. This workaround is called multidrop. This only works if there is ONE transmitter and multiple receivers. The recipients all receive the same data packets and discard those they do not understand. As soon as the receivers also have to react, this concept with RS232 fails. Devices transmitting at the same time lead to collisions. The transmission becomes unreadable. I believe SD has only sent over BLE so far. Some devices, e.g. the Becker AR6201 also need to send data to SD, and then multidrop will fail. I assume that each controlled device has to use its own BLE. Maybe Tim can say something about that? If becker needs to send back (dont understand why, because it should only receive freq from SD, bi direction is used on glass cockpits when you control com via display and you need to see tuned freq im case that you tune freq manually on radio, this is not feature in SD, so no need to com back from radio), and if, then its still not an issue, because AP only receives, so the TX line from IRXON goes to becker and AP and TX from becker to RX irxon, there will be still only one bidirectional device...
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By Laycom - 11/24/2024 6:00:06 PM
+x+x+x+x+x+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. Hello I have connected 1 bluetooth device to Funke radio and Dynon autopilot. It works great with Android but doesn't work with iPhone. With iphone you have to choose radio or Ap. Did we miss something or does it not work to control both with the iPhone. Is there anything that solves this? or should I mount 2 bluetooth units one yill radio and the other for AP
I'm not sure I understood you correctly, you only connected ONE bluetooth device to the Funke radio AND to the Dynon autopilot? How did you do that? Yes, i have on one IRXON Trig radio and Dynon AP... Just use the same RS232 wire for both... Well, RS232 is defined as a bidirectional point-to-point connection. If you only send in one direction, this is possible. This workaround is called multidrop. This only works if there is ONE transmitter and multiple receivers. The recipients all receive the same data packets and discard those they do not understand. As soon as the receivers also have to react, this concept with RS232 fails. Devices transmitting at the same time lead to collisions. The transmission becomes unreadable. I believe SD has only sent over BLE so far. Some devices, e.g. the Becker AR6201 also need to send data to SD, and then multidrop will fail. I assume that each controlled device has to use its own BLE. Maybe Tim can say something about that? If becker needs to send back (dont understand why, because it should only receive freq from SD, bi direction is used on glass cockpits when you control com via display and you need to see tuned freq im case that you tune freq manually on radio, this is not feature in SD, so no need to com back from radio), and if, then its still not an issue, because AP only receives, so the TX line from IRXON goes to becker and AP and TX from becker to RX irxon, there will be still only one bidirectional device... Becker can only control both frequencies in one command, so you need to know which frequency is tuned in the other channel. You have to read the status of the device constantly. And that creates traffic to SD. 2 Becker radios on one BLE device definitely doesn't work. But I think Tim should say something about this...whether he allows such a configuration or not.
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By Tim Dawson - 11/25/2024 3:51:01 PM
Our new 4.0.1 version allows the TX part of the Bluetooth configuration to be connected to both a radio (so frequencies can be sent) and autopilot (so course data can be sent). In future, my goal is to allow the same Bluetooth device to also act as a GPS/traffic receiver through the RX part, but that cannot currently be done, you need two Bluetooth devices in this case.
As Michael says, as soon as a device needs bidirectional communication - as the Becker radios do - this concept will not work.
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By vikino - 11/27/2024 7:35:20 AM
+xOur new 4.0.1 version allows the TX part of the Bluetooth configuration to be connected to both a radio (so frequencies can be sent) and autopilot (so course data can be sent). In future, my goal is to allow the same Bluetooth device to also act as a GPS/traffic receiver through the RX part, but that cannot currently be done, you need two Bluetooth devices in this case.
As Michael says, as soon as a device needs bidirectional communication - as the Becker radios do - this concept will not work. Yes, it will not work in setup like: one bt device, ap, traffic and becker, but setup: one bt device, ap and becker will work...
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By Lidders - 11/27/2024 8:16:33 PM
+x+x+x+xAll,
I was very excited when I read about the feature in the Skydemon release note, went right into ordering parts and figured I share the experience here.
Top 1 priority for me was to get the radio (f.u.n.k.e. ATR833-II) connected. So I designed a 3d case that perfectly fits on top of the original Sub-D connector housing and uses the existing screw holes (only needed slightly longer screws). Once mounted, it sits below the connector at the back of the radio and doesn't block anything else / basically uses the same space.
I decided to use a HM-18 BLE to serial module. It is very power efficient and therefore I could easily use the 5V the radio provides on the Sub-D connector. The HM-18 is outputting TTL serial, hence I added a MAX3232 converter to provide the proper RS232 levels the radio expects.
Put everything together and it worked right away. For me it's almost a killer feature in Skydemon as it makes my life so much more simple during flight. A big thx to Tim and his team for adding this feature!
Hi moefly,
according to HM-18 datasheet the power supply voltage is from 1.9V to 3.7V. The ATR833 has 5V output. Do you use a voltage converter or do you just run out of specs?
Regards, Tobi
The same module is on Amazon uk for £12, it says Vcc is 3.6V to 6.0V. You're right. Thanks for the response. Even on DSD Tech homepage you'll find: Work voltage(VCC): 3.6V to 6V TTL logic level (TX, RX): 3.3V But on the linked datasheet you'll read: Power: +1.9~3.7 VDC 50mA I'll just try it.
Thanks, Tobi
TTL logic level (TX, RX): 3.3V
I think the confusion stems from the fact that the bluetooth module is actually one pcb on top of another. The base pcb has a 5v to 3.3v regulator to supply power to the upper module which is 3.3v only. So 5v should work just fine.
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By jekroth - 12/6/2024 8:36:23 PM
+x+x+xNo, not until there is a device with widespread uptake in the community that we can actually develop with. We can't just "support Bluetooth" without a known device to develop and test with. Hello I have connected 1 bluetooth device to Funke radio and Dynon autopilot. It works great with Android but doesn't work with iPhone. With iphone you have to choose radio or Ap. Did we miss something or does it not work to control both with the iPhone. Is there anything that solves this? or should I mount 2 bluetooth units one yill radio and the other for AP
I'm not sure I understood you correctly, you only connected ONE bluetooth device to the Funke radio AND to the Dynon autopilot? How did you do that? Yes with Y cable. It works perfectly with Android, but with Iphone it only works to control one device
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By jekroth - 12/6/2024 8:46:26 PM
+xOur new 4.0.1 version allows the TX part of the Bluetooth configuration to be connected to both a radio (so frequencies can be sent) and autopilot (so course data can be sent). In future, my goal is to allow the same Bluetooth device to also act as a GPS/traffic receiver through the RX part, but that cannot currently be done, you need two Bluetooth devices in this case.
As Michael says, as soon as a device needs bidirectional communication - as the Becker radios do - this concept will not work. i got it working with android but not with iphone. is that what is fixed in the current beta
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By jekroth - 12/6/2024 8:49:02 PM
+x+xOur new 4.0.1 version allows the TX part of the Bluetooth configuration to be connected to both a radio (so frequencies can be sent) and autopilot (so course data can be sent). In future, my goal is to allow the same Bluetooth device to also act as a GPS/traffic receiver through the RX part, but that cannot currently be done, you need two Bluetooth devices in this case.
As Michael says, as soon as a device needs bidirectional communication - as the Becker radios do - this concept will not work. i got it working with android but not with iphone. is that what is fixed in the current beta is it possible to opt out of navaids in the radio tab.
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By Laycom - 12/15/2024 7:38:39 PM
+xThanks to Tim there is now an Android beta with support of the Becker AR6201 protocol.
Here is my solution to connect a BLE device to the Becker AR6201 radio:
Bill of material:
DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART Modul mit 4 PIN Base Board für Arduino UNO R3 Mega 2560 Nano
RS422 MAX490 Mutual Transfer Full-duplex TTL Bi-directional Signal Module DC 5V
AMS1117 DC-DC Step Down Voltage Converter 6V - 12V to 5V
Minifuse 125 mA
My BLE to AR620x housing Please contact me for STL-files, if needed.
The schematic of the circuit is attached.
Please note this is only for 12 V bus voltage, and ONLY for experimental use!!!
Cheers! I have the next AR620x adapter ready. It looks like this is becoming a business model for some people... But you can make the adapter yourself as described above. If you don't know much about electronics, soldering and 3D printing, I'll do it for you. No large quantities, just one handmade piece at a time. The adapter fits directly onto the free connection of your Becker AR620x. All that is required is a power connection (+12 V, GND) - no further mechanical work.I guess 70-90 bugs is enough for one unit.
Please note: THIS IS 12 V EXPERIMEMTAL ONLY! ... but will work like a charme...
Cheers!
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By ALSL-Flyer - 12/15/2024 8:50:32 PM
+x+xThanks to Tim there is now an Android beta with support of the Becker AR6201 protocol.
Here is my solution to connect a BLE device to the Becker AR6201 radio:
Bill of material:
DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART Modul mit 4 PIN Base Board für Arduino UNO R3 Mega 2560 Nano
RS422 MAX490 Mutual Transfer Full-duplex TTL Bi-directional Signal Module DC 5V
AMS1117 DC-DC Step Down Voltage Converter 6V - 12V to 5V
Minifuse 125 mA
My BLE to AR620x housing Please contact me for STL-files, if needed.
The schematic of the circuit is attached.
Please note this is only for 12 V bus voltage, and ONLY for experimental use!!!
Cheers! I have the next AR620x adapter ready. It looks like this is becoming a business model for some people... But you can make the adapter yourself as described above. If you don't know much about electronics, soldering and 3D printing, I'll do it for you. No large quantities, just one handmade piece at a time. The adapter fits directly onto the free connection of your Becker AR620x. All that is required is a power connection (+12 V, GND) - no further mechanical work. I guess 70-90 bugs is enough for one unit.
Please note: THIS IS 12 V EXPERIMEMTAL ONLY! ... but will work like a charme...
Cheers! Michael, this looks like a perfect solution! Great! You fixed the connector with the slider - could you please share the source for this slider?
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By Laycom - 12/15/2024 9:16:39 PM
+x+x+xThanks to Tim there is now an Android beta with support of the Becker AR6201 protocol.
Here is my solution to connect a BLE device to the Becker AR6201 radio:
Bill of material:
DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART Modul mit 4 PIN Base Board für Arduino UNO R3 Mega 2560 Nano
RS422 MAX490 Mutual Transfer Full-duplex TTL Bi-directional Signal Module DC 5V
AMS1117 DC-DC Step Down Voltage Converter 6V - 12V to 5V
Minifuse 125 mA
My BLE to AR620x housing Please contact me for STL-files, if needed.
The schematic of the circuit is attached.
Please note this is only for 12 V bus voltage, and ONLY for experimental use!!!
Cheers! I have the next AR620x adapter ready. It looks like this is becoming a business model for some people... But you can make the adapter yourself as described above. If you don't know much about electronics, soldering and 3D printing, I'll do it for you. No large quantities, just one handmade piece at a time. The adapter fits directly onto the free connection of your Becker AR620x. All that is required is a power connection (+12 V, GND) - no further mechanical work. I guess 70-90 bugs is enough for one unit.
Please note: THIS IS 12 V EXPERIMEMTAL ONLY! ... but will work like a charme...
Cheers! Michael, this looks like a perfect solution! Great! You fixed the connector with the slider - could you please share the source for this slider?
Amphenol Conec 165X11299XE You will need the slider, the spring and 4 of 6 screws.
https://www.digikey.de/de/products/detail/amphenol-conec/165X11299XE/1017451?srsltid=AfmBOoqFji0EENN9MVwPm7CfNOq5eAT4pUIFHrqCrk8X-L_AZz48RMad
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By ALSL-Flyer - 12/16/2024 9:56:53 PM
+x+x+x+xThanks to Tim there is now an Android beta with support of the Becker AR6201 protocol.
Here is my solution to connect a BLE device to the Becker AR6201 radio:
Bill of material:
DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART Modul mit 4 PIN Base Board für Arduino UNO R3 Mega 2560 Nano
RS422 MAX490 Mutual Transfer Full-duplex TTL Bi-directional Signal Module DC 5V
AMS1117 DC-DC Step Down Voltage Converter 6V - 12V to 5V
Minifuse 125 mA
My BLE to AR620x housing Please contact me for STL-files, if needed.
The schematic of the circuit is attached.
Please note this is only for 12 V bus voltage, and ONLY for experimental use!!!
Cheers! I have the next AR620x adapter ready. It looks like this is becoming a business model for some people... But you can make the adapter yourself as described above. If you don't know much about electronics, soldering and 3D printing, I'll do it for you. No large quantities, just one handmade piece at a time. The adapter fits directly onto the free connection of your Becker AR620x. All that is required is a power connection (+12 V, GND) - no further mechanical work. I guess 70-90 bugs is enough for one unit.
Please note: THIS IS 12 V EXPERIMEMTAL ONLY! ... but will work like a charme...
Cheers! Michael, this looks like a perfect solution! Great! You fixed the connector with the slider - could you please share the source for this slider?
Amphenol Conec 165X11299XE You will need the slider, the spring and 4 of 6 screws.
https://www.digikey.de/de/products/detail/amphenol-conec/165X11299XE/1017451?srsltid=AfmBOoqFji0EENN9MVwPm7CfNOq5eAT4pUIFHrqCrk8X-L_AZz48RMad Michael, thanks a lot, especially that you forwarded the exact type number was extremely helpful. At "Voelkner" we get the housing for less than 5€. Great!!
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By Laycom - 12/17/2024 9:32:27 PM
For those who don't want to tinker:
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By Paul Milling - 12/18/2024 2:47:54 PM
Hi Tim Great that we can now send com frequency from the radio page in Skydemon. Would it also be possible to add functionality to be able to key a frequency in and send it to the radio. Say an additional selection within the radio menu which brings up a keypad similar to below?
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By ALSL-Flyer - 12/18/2024 9:14:28 PM
..here you can see my approach. Thanks to Michael hints the Becker connector issue is now solved. This device is now ready for the test with the Becker Radio. The pre check was done with the female connector where I connected the Tx with the Rx pins. With this approach it was possible the HW-path until the Rx pin of the BT Module.One issue took some hours to solve. The BT-Modul need 3.3V signals and the RS322-TTL module delivers 5V signals. The BT Module stopped working... only after adapting to 3.3V by 2 resistors it worked. I will report about the results tomorrow... 
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By Laycom - 12/18/2024 9:26:38 PM
+xFor those who don't want to tinker: For those who don't want to tinker ... next one is made:
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By ALSL-Flyer - 12/19/2024 1:19:41 PM
After activating the Tandem option in the Becker menue, it worked directly an absolutly perfekt with the Beta version of SD. Many thanks to SkyDemon..especially to TIM. Great Job!
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By Dortro - 12/19/2024 9:11:11 PM
Dear fellow SD users,
I am new here and need some advice.
I use a KRT2 radio and bought a IRXSON BT580 adapter. I want to send radio frequencies from SD on my iPad to the KRT2 via the adapter.
Question: Do I need to hard wire (solder) the pins on the RS 232 adapter to the pins on the db9 plug on the KRT2 (of course, the connections as mentioned in the SD user manual)? And what about the power supply for the BT580?
Thank you so much!
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By Laycom - 12/19/2024 9:11:13 PM
+xThanks to Tim there is now an Android beta with support of the Becker AR6201 protocol.
Here is my solution to connect a BLE device to the Becker AR6201 radio:
Bill of material:
DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART Modul mit 4 PIN Base Board für Arduino UNO R3 Mega 2560 Nano
RS422 MAX490 Mutual Transfer Full-duplex TTL Bi-directional Signal Module DC 5V
AMS1117 DC-DC Step Down Voltage Converter 6V - 12V to 5V
Minifuse 125 mA
My BLE to AR620x housing Please contact me for STL-files, if needed.
The schematic of the circuit is attached.
Please note this is only for 12 V bus voltage, and ONLY for experimental use!!!
Cheers! An addendum to the Becker AR620X BLE circuit:
Do not use RS-422 port 2, this is already used internally to connect the control unit. This still works, but is unreliable. Collisions occur when sending frequency settings. 9 out of 10 commands work, but the rest will drive you nuts. So use RS-422 PORT 1 (pins 7,8,14,15 instead of pins 2,3, 9,10).
A new schematic is attached.Life is a barrel of fun. Sometimes a barrel of Sauerkraut.
Cheers.
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By Laycom - 12/19/2024 9:34:03 PM
+xDear fellow SD users,I am new here and need some advice.I use a KRT2 radio and bought a IRXSON BT580 adapter.I want to send radio frequencies from SD on my iPad to the KRT2 via the adapter.Question: Do I need to hard wire (solder) the pins on the RS 232 adapter to the pins on the db9 plug on the KRT2 (of course, the connections as mentioned in the SD user manual)? And what about the power supply for the BT580?Thank you so much! Dear Dortro, I can't say much about the KTR2 or the BT580. But yes, the signal lines have to be connected and a power supply wouldn't be bad either. How did you connect the BT580 now? Simply placing them next to each other doesn't work. You definitely mean IRXON, right?
Life is a barrel of fun.
Michael
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By Dortro - 12/20/2024 7:28:18 AM
Hi Michael,
Thank you for your somewhat clinical answer, I appreciate it. I have not used the IRXON BT580 yet, it is on my desk not in my plane (Phoenix MLA)…. I had hoped someone has experience with the combi BT580 - KRT2 I will connect the right pins, of course, and not just put them on top of each other. The question about power supply for the BT580, I still have, however… Best regards
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By SeanKx - 12/20/2024 7:49:00 AM
Has anyone yet managed to wire the Irxon into a Trig TY91?
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By Dortro - 12/20/2024 1:20:06 PM
+x+xOr maybe more user and installation friendly is IRXON BT578 v3 or BT580, they work with Apple and Android well... Btw, IRXON is plug and play, it is set to 9600baud so every radio, at least Garmin, Trig, KRT2, Funke, all those are 9600 by default and accept NMEA0183 messages, as well as autopilot controllers, also mostly by default 9600bps, so IRXON could be the way to make it as compactible device... Im ready to test  Hi Vikino,I have a BT580 and iPad air. SD keeps searching for a Bluetooth device.. I hope you can help! Can we talk off line or email? Thanks, Robert
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By Laycom - 12/20/2024 9:43:24 PM
+xHi Michael,Thank you for your somewhat clinical answer, I appreciate it.I have not used the IRXON BT580 yet, it is on my desk not in my plane (Phoenix MLA)….I had hoped someone has experience with the combi BT580 - KRT2I will connect the right pins, of course, and not just put them on top of each other.The question about power supply for the BT580, I still have, however…Best regards Hello Dorto, in addition to my somewhat clinical answer, here are some suggestions on how to solve the problem. There are installation instructions for the KRT-2 freely available in various languages. You can find the pin assignment there. Fortunately, these guys have a connection for a remote control prepared. You can use it for your purpose.Look at the Remote Connetor (Pin 13 and 2 are Data and Pin 15/8 are Avonics Power and Pins 1/9 are GND). Now you need a partner connection on the BT580. The manuel depicts this: Signal routing is KTR2/13 to BT580/3, KTR2/2 to BTR580/2. Power routing is KTR2/1 or 9 to BT580/5 for GND.
You shoud use for the signal wires AWG 22 and for the power wires AWG 18. But this is not so important, current is low.
And now it depends! What is your avionics power voltage? The BT need VCC (power) in a range 3 ... 6 V DC. If you have a 5V DC source in your plane, you can use this. Any other case you have to install a voltage regulator (DC-DC drop down) from you avionics bus voltage to the needed 5 V on Pin BT580/9.
Hope this will give you some hints.
Regards Michael
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By Laycom - 12/20/2024 10:23:28 PM
+x+xHi Michael,Thank you for your somewhat clinical answer, I appreciate it.I have not used the IRXON BT580 yet, it is on my desk not in my plane (Phoenix MLA)….I had hoped someone has experience with the combi BT580 - KRT2I will connect the right pins, of course, and not just put them on top of each other.The question about power supply for the BT580, I still have, however…Best regards Hello Dorto,in addition to my somewhat clinical answer, here are some suggestions on how to solve the problem. There are installation instructions for the KRT-2 freely available in various languages. You can find the pin assignment there. Fortunately, these guys have a connection for a remote control prepared. You can use it for your purpose. Look at the Remote Connetor (Pin 13 and 2 are Data and Pin 15/8 are Avonics Power and Pins 1/9 are GND). Now you need a partner connection on the BT580. The manuel depicts this: Signal routing is KTR2/13 to BT580/3, KTR2/2 to BTR580/2. Power routing is KTR2/1 or 9 to BT580/5 for GND.
You shoud use for the signal wires AWG 22 and for the power wires AWG 18. But this is not so important, current is low.
And now it depends! What is your avionics power voltage? The BT need VCC (power) in a range 3 ... 6 V DC. If you have a 5V DC source in your plane, you can use this. Any other case you have to install a voltage regulator (DC-DC drop down) from you avionics bus voltage to the needed 5 V on Pin BT580/9.
Hope this will give you some hints.
Regards Michael
I'm currently thinking about how this could perhaps be done better with the SD BLE for a KTR-2, without the huge BT580 block and without tinkering with cables. You need the smallest possible adapter (dongle) between the KTR-2 and the existing SUB-D plug. I think I could do that. The dongle contains a small BLE module and connects it to the KTR-2. The power supply comes via the existing VCC and GND lines in the connector and is regulated internally. All other cables are laid 1:1 in the connector (shielded).
All you have to do is remove the existing connector from the KRT-2 and insert the new module (dongle) in between. Would that be something? Please give me feedback.
Just a thought.
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By Dortro - 12/21/2024 7:53:40 AM
Hi Michael,
Thank you very much for both answers, this is very helpful! I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?
My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it. One of those things, it should detect the device almost immediately, but it does not…
Again, thank you!
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By Final glide - 12/21/2024 9:11:11 AM
Well hats off to the skydemon team!!! I made a demo panel with three units running off one BT unit A trig radio, AV-30 and fuel flow computer They all worked perfectly with the radio and autopilot function ticked together The only issue was the trig had old software so didn’t work until this was updated. What a brilliant job by Tim and the team SD just keeps getting better and better !!! Many thanks James
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By Laycom - 12/21/2024 9:18:08 AM
+xWell hats off to the skydemon team!!!I made a demo panel with three units running off one BT unit A trig radio, AV-30 and fuel flow computer They all worked perfectly with the radio and autopilot function ticked together The only issue was the trig had old software so didn’t work until this was updated.What a brilliant job by Tim and the team SD just keeps getting better and better !!!Many thanks James Hi James, what functions are controlled in the AV-30 and fuel flow computer by SD?
Regards Michael
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By Final glide - 12/21/2024 9:29:34 AM
Hi the SD outputs speed and track so all the nav info on AV-30 is available and on the FF computer it gets time and speed and distance so is perfect I have a Bendix autopilot being fitted this winter and it will work that as well I am sure What a brilliant system ! I did have a garmin handheld on the panel to feed the Av and FF but that is now on the shelf
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By Laycom - 12/21/2024 9:45:14 AM
+xHi the SD outputs speed and track so all the nav info on AV-30 is available and on the FF computer it gets time and speed and distance so is perfect I have a Bendix autopilot being fitted this winter and it will work that as well I am sure What a brilliant system !I did have a garmin handheld on the panel to feed the Av and FF but that is now on the shelf That sounds interesting. Do you have any information on wiring and configuring the AV-30 to input groundspeed, track and distance? Do you need an AV-Link or AV-HSI for these functions? What FF computer is it? Pictures would be fine.
Questions about questions... 
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By Laycom - 12/21/2024 10:02:59 AM
+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Dorto, I think 70...90 bugs, like the AR620X BLE. The problem is that I don't have a KRT2 on my desk to test. I can't say anything about why the BT580 won't connect to SD. I haven't had a BT580 yet either.
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By maikmita - 1/6/2025 3:02:49 PM
+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Hello Michael,
very interesting solution. I am using the Krt2 in combination with the Air Control Display from Air Avionics, which functions as a remote control for the KRT2.
I am wondering if your solution would be able to operate in between those two devices or if I would need to place a switch in between to decide whether the BT or the air control display is connected to the KRT2?
Best regards from the south of Germany,
Maik
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By Laycom - 1/6/2025 6:58:52 PM
+x+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Hello Michael,
very interesting solution. I am using the Krt2 in combination with the Air Control Display from Air Avionics, which functions as a remote control for the KRT2.
I am wondering if your solution would be able to operate in between those two devices or if I would need to place a switch in between to decide whether the BT or the air control display is connected to the KRT2?
Best regards from the south of Germany,
Maik
Well, the first answer is NO - but it depends...The KRT2 uses an RS232 interface for communication. RS232 is by definition a point-to-point connection, not a bus system. This standard can be extended to one transmitter and N receivers without any problems, as long as the output of the transmitter is not overloaded. This is called multi-drop. For us this means: A BLE module sends to several RX devices via TX without problems.
It doesn't work the other way around. Multiple transmitters cannot transmit to one receiver, for 2 reasons: 1.) The outputs of the transmitters work electrically against each other, which is like a short circuit. 2.) If both transmitters transmit at the same time, the data becomes unreadable (corrupted).
But no problem without a solution or at least a workaround... The simplest solution is 2 diodes. These are connected to the TX lines to prevent a short circuit. This means that the V24 levels are no longer 100% correct, but it usually works. You can improve the result with a pullup resistor. But I wouldn't use this DIY solution for an avionics device.
And here comes the solution: The KRT2 BLE adapter from SD-Link mentioned above has 2 independent RS232 channels internally. Normally only one RS232 channel is used to output the received BLE command to the radio and to pin 13 of the outside connector. But that can be reprogrammed, to use pin 13 as an isolated RS232-input as well.
Then both signals are ORed with the correct V24 levels and passed on to the radio. You just have to make sure that both sources are not transmitting at the same time. Does the Air Control Display transmit constantly or only when the frequency changes? SD is transmitting only, when a frequency is changed.
Best regards from the east of Germany Michael
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By maikmita - 1/6/2025 7:34:16 PM
+x+x+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Hello Michael,
very interesting solution. I am using the Krt2 in combination with the Air Control Display from Air Avionics, which functions as a remote control for the KRT2.
I am wondering if your solution would be able to operate in between those two devices or if I would need to place a switch in between to decide whether the BT or the air control display is connected to the KRT2?
Best regards from the south of Germany,
Maik
Well, the first answer is NO - but it depends... The KRT2 uses an RS232 interface for communication. RS232 is by definition a point-to-point connection, not a bus system. This standard can be extended to one transmitter and N receivers without any problems, as long as the output of the transmitter is not overloaded. This is called multi-drop. For us this means: A BLE module sends to several RX devices via TX without problems.
It doesn't work the other way around. Multiple transmitters cannot transmit to one receiver, for 2 reasons: 1.) The outputs of the transmitters work electrically against each other, which is like a short circuit. 2.) If both transmitters transmit at the same time, the data becomes unreadable (corrupted).
But no problem without a solution or at least a workaround... The simplest solution is 2 diodes. These are connected to the TX lines to prevent a short circuit. This means that the V24 levels are no longer 100% correct, but it usually works. You can improve the result with a pullup resistor. But I wouldn't use this DIY solution for an avionics device.
And here comes the solution: The KRT2 BLE adapter from SD-Link mentioned above has 2 independent RS232 channels internally. Normally only one RS232 channel is used to output the received BLE command to the radio and to pin 13 of the outside connector. But that can be reprogrammed, to use pin 13 as an isolated RS232-input as well.
Then both signals are ORed with the correct V24 levels and passed on to the radio. You just have to make sure that both sources are not transmitting at the same time. Does the Air Control Display transmit constantly or only when the frequency changes? SD is transmitting only, when a frequency is changed.
Best regards from the east of Germany Michael
Michael,
thanks a lot for this detailed answer.
Right now I do not know if the air control display transmits constantly. But I try to investigate in the documentation.
What I know is, that the communication with the Krt2 is bidirectional because changes on the KRT2 will also be displayed on the air control display. So RX and TX are both used from my point of view.
I am not sure if I got you correct: you mean when reprogramming the adapter to use pin 13 as a separate RS232 chanel it will receive the commands from the air control display on pin 13 and forwards it on the other chanel to the pin of the KRT2?
Regards Maik
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By maikmita - 1/6/2025 7:45:19 PM
+x+x+x+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Hello Michael,
very interesting solution. I am using the Krt2 in combination with the Air Control Display from Air Avionics, which functions as a remote control for the KRT2.
I am wondering if your solution would be able to operate in between those two devices or if I would need to place a switch in between to decide whether the BT or the air control display is connected to the KRT2?
Best regards from the south of Germany,
Maik
Well, the first answer is NO - but it depends... The KRT2 uses an RS232 interface for communication. RS232 is by definition a point-to-point connection, not a bus system. This standard can be extended to one transmitter and N receivers without any problems, as long as the output of the transmitter is not overloaded. This is called multi-drop. For us this means: A BLE module sends to several RX devices via TX without problems.
It doesn't work the other way around. Multiple transmitters cannot transmit to one receiver, for 2 reasons: 1.) The outputs of the transmitters work electrically against each other, which is like a short circuit. 2.) If both transmitters transmit at the same time, the data becomes unreadable (corrupted).
But no problem without a solution or at least a workaround... The simplest solution is 2 diodes. These are connected to the TX lines to prevent a short circuit. This means that the V24 levels are no longer 100% correct, but it usually works. You can improve the result with a pullup resistor. But I wouldn't use this DIY solution for an avionics device.
And here comes the solution: The KRT2 BLE adapter from SD-Link mentioned above has 2 independent RS232 channels internally. Normally only one RS232 channel is used to output the received BLE command to the radio and to pin 13 of the outside connector. But that can be reprogrammed, to use pin 13 as an isolated RS232-input as well.
Then both signals are ORed with the correct V24 levels and passed on to the radio. You just have to make sure that both sources are not transmitting at the same time. Does the Air Control Display transmit constantly or only when the frequency changes? SD is transmitting only, when a frequency is changed.
Best regards from the east of Germany Michael
Michael,
thanks a lot for this detailed answer.
Right now I do not know if the air control display transmits constantly. But I try to investigate in the documentation.
What I know is, that the communication with the Krt2 is bidirectional because changes on the KRT2 will also be displayed on the air control display. So RX and TX are both used from my point of view.
I am not sure if I got you correct: you mean when reprogramming the adapter to use pin 13 as a separate RS232 chanel it will receive the commands from the air control display on pin 13 and forwards it on the other chanel to the pin of the KRT2?
Regards Maik

I am not sure, but for me it sounds like it is only transmitting when a change has been performed.
Regards Maik
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By Laycom - 1/6/2025 7:49:36 PM
+x+x+x+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Hello Michael,
very interesting solution. I am using the Krt2 in combination with the Air Control Display from Air Avionics, which functions as a remote control for the KRT2.
I am wondering if your solution would be able to operate in between those two devices or if I would need to place a switch in between to decide whether the BT or the air control display is connected to the KRT2?
Best regards from the south of Germany,
Maik
Well, the first answer is NO - but it depends... The KRT2 uses an RS232 interface for communication. RS232 is by definition a point-to-point connection, not a bus system. This standard can be extended to one transmitter and N receivers without any problems, as long as the output of the transmitter is not overloaded. This is called multi-drop. For us this means: A BLE module sends to several RX devices via TX without problems.
It doesn't work the other way around. Multiple transmitters cannot transmit to one receiver, for 2 reasons: 1.) The outputs of the transmitters work electrically against each other, which is like a short circuit. 2.) If both transmitters transmit at the same time, the data becomes unreadable (corrupted).
But no problem without a solution or at least a workaround... The simplest solution is 2 diodes. These are connected to the TX lines to prevent a short circuit. This means that the V24 levels are no longer 100% correct, but it usually works. You can improve the result with a pullup resistor. But I wouldn't use this DIY solution for an avionics device.
And here comes the solution: The KRT2 BLE adapter from SD-Link mentioned above has 2 independent RS232 channels internally. Normally only one RS232 channel is used to output the received BLE command to the radio and to pin 13 of the outside connector. But that can be reprogrammed, to use pin 13 as an isolated RS232-input as well.
Then both signals are ORed with the correct V24 levels and passed on to the radio. You just have to make sure that both sources are not transmitting at the same time. Does the Air Control Display transmit constantly or only when the frequency changes? SD is transmitting only, when a frequency is changed.
Best regards from the east of Germany Michael
Michael,
thanks a lot for this detailed answer.
Right now I do not know if the air control display transmits constantly. But I try to investigate in the documentation.
What I know is, that the communication with the Krt2 is bidirectional because changes on the KRT2 will also be displayed on the air control display. So RX and TX are both used from my point of view.
I am not sure if I got you correct: you mean when reprogramming the adapter to use pin 13 as a separate RS232 chanel it will receive the commands from the air control display on pin 13 and forwards it on the other chanel to the pin of the KRT2?
Regards Maik
Maik, you got me right. The data from an external source can be passed on to the radio via pin 13. It just can't be sent at the same time. The signals are electrically decoupled. Outgoing data from the KRT2 are not a problem. The signal is forwarded unchanged to pin 2 outbound. This is an option of the KRT2 BLE Adapter and must be specified when ordering.
Best Michael
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By Laycom - 1/6/2025 8:16:47 PM
+x+x+x+x+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Hello Michael,
very interesting solution. I am using the Krt2 in combination with the Air Control Display from Air Avionics, which functions as a remote control for the KRT2.
I am wondering if your solution would be able to operate in between those two devices or if I would need to place a switch in between to decide whether the BT or the air control display is connected to the KRT2?
Best regards from the south of Germany,
Maik
Well, the first answer is NO - but it depends... The KRT2 uses an RS232 interface for communication. RS232 is by definition a point-to-point connection, not a bus system. This standard can be extended to one transmitter and N receivers without any problems, as long as the output of the transmitter is not overloaded. This is called multi-drop. For us this means: A BLE module sends to several RX devices via TX without problems.
It doesn't work the other way around. Multiple transmitters cannot transmit to one receiver, for 2 reasons: 1.) The outputs of the transmitters work electrically against each other, which is like a short circuit. 2.) If both transmitters transmit at the same time, the data becomes unreadable (corrupted).
But no problem without a solution or at least a workaround... The simplest solution is 2 diodes. These are connected to the TX lines to prevent a short circuit. This means that the V24 levels are no longer 100% correct, but it usually works. You can improve the result with a pullup resistor. But I wouldn't use this DIY solution for an avionics device.
And here comes the solution: The KRT2 BLE adapter from SD-Link mentioned above has 2 independent RS232 channels internally. Normally only one RS232 channel is used to output the received BLE command to the radio and to pin 13 of the outside connector. But that can be reprogrammed, to use pin 13 as an isolated RS232-input as well.
Then both signals are ORed with the correct V24 levels and passed on to the radio. You just have to make sure that both sources are not transmitting at the same time. Does the Air Control Display transmit constantly or only when the frequency changes? SD is transmitting only, when a frequency is changed.
Best regards from the east of Germany Michael
Michael,
thanks a lot for this detailed answer.
Right now I do not know if the air control display transmits constantly. But I try to investigate in the documentation.
What I know is, that the communication with the Krt2 is bidirectional because changes on the KRT2 will also be displayed on the air control display. So RX and TX are both used from my point of view.
I am not sure if I got you correct: you mean when reprogramming the adapter to use pin 13 as a separate RS232 chanel it will receive the commands from the air control display on pin 13 and forwards it on the other chanel to the pin of the KRT2?
Regards Maik

I am not sure, but for me it sounds like it is only transmitting when a change has been performed.
Regards Maik
I don't see an answer to the problem of a continuously sent status report for the device here. Only the manufacturer can answer that or you can connect an oscilloscope to the line and take a look. I would do that.
|
By Paul Milling - 1/8/2025 1:51:36 PM
+x+xDoes the IRXON device need to have a ground wire on the 9 Pin D-Sub given that the device itself has its own power (ie., battery) or it can be powered by a USB cable connected to a panel-mounted USB charger outlet which is already grounded?
Just checking as I'm planning to connect it to my Trig TC90 Head and wanted to know if I just needed an RX/TX data wire.
Dear Paul, I am not a specialist, but just received the IRXON BT578 v.3, and just tested it with the SkyD iOS app (Tx/Rx still not connected to the radio, though). It worked perfectly with power from a USB-C charger, as per the product notice. So I assume a ground wire is not required for powering the IRXON. My understanding is that the data wire will be enough with my Trig, but cannot confirm this until actually testing - hopefully next month. Hope this helps ! Thanks Urbino, I'm in the same position as you. I have the IRXON and have connected it to SkyD just fine. Haven't as yet connected it to my Trig. Hopefully will be doing this sometime this month.
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By ALSL-Flyer - 1/8/2025 8:10:52 PM
+x  So for the AV-30 no avlink needed just the data wireI have four data wires running off one BT unit !! Hi Final Glide. My AV30 is now also receiving the AP-Dataset. Thanks a lot for your hints.
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By ALSL-Flyer - 1/8/2025 8:28:13 PM
next step... after Radio and AV30 are working wonderful, I would like to activate the third new BLE-option to transmit GPS and Traffic via BLE. I have activated this accordingly before I press the "Fly" button. SD reports "waiting for data" then Seeking "GPS-Satellites". Looks good so far, but position is not accepted by SD-App even GPS-position is fixed. Any hints?
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By ALSL-Flyer - 1/10/2025 8:54:18 PM
I'm desperate. I can't get the GPS data to the SD app via the BLE module. If I send the same data packet over WiFi, the position data are accepted immediately. What else could that be? ...does anyone have this running?
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By ALSL-Flyer - 1/11/2025 2:17:34 PM
+x+x+x+x+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Hello Michael,
very interesting solution. I am using the Krt2 in combination with the Air Control Display from Air Avionics, which functions as a remote control for the KRT2.
I am wondering if your solution would be able to operate in between those two devices or if I would need to place a switch in between to decide whether the BT or the air control display is connected to the KRT2?
Best regards from the south of Germany,
Maik
Well, the first answer is NO - but it depends... The KRT2 uses an RS232 interface for communication. RS232 is by definition a point-to-point connection, not a bus system. This standard can be extended to one transmitter and N receivers without any problems, as long as the output of the transmitter is not overloaded. This is called multi-drop. For us this means: A BLE module sends to several RX devices via TX without problems.
It doesn't work the other way around. Multiple transmitters cannot transmit to one receiver, for 2 reasons: 1.) The outputs of the transmitters work electrically against each other, which is like a short circuit. 2.) If both transmitters transmit at the same time, the data becomes unreadable (corrupted).
But no problem without a solution or at least a workaround... The simplest solution is 2 diodes. These are connected to the TX lines to prevent a short circuit. This means that the V24 levels are no longer 100% correct, but it usually works. You can improve the result with a pullup resistor. But I wouldn't use this DIY solution for an avionics device.
And here comes the solution: The KRT2 BLE adapter from SD-Link mentioned above has 2 independent RS232 channels internally. Normally only one RS232 channel is used to output the received BLE command to the radio and to pin 13 of the outside connector. But that can be reprogrammed, to use pin 13 as an isolated RS232-input as well.
Then both signals are ORed with the correct V24 levels and passed on to the radio. You just have to make sure that both sources are not transmitting at the same time. Does the Air Control Display transmit constantly or only when the frequency changes? SD is transmitting only, when a frequency is changed.
Best regards from the east of Germany Michael
Michael,
thanks a lot for this detailed answer.
Right now I do not know if the air control display transmits constantly. But I try to investigate in the documentation.
What I know is, that the communication with the Krt2 is bidirectional because changes on the KRT2 will also be displayed on the air control display. So RX and TX are both used from my point of view.
I am not sure if I got you correct: you mean when reprogramming the adapter to use pin 13 as a separate RS232 chanel it will receive the commands from the air control display on pin 13 and forwards it on the other chanel to the pin of the KRT2?
Regards Maik

I am not sure, but for me it sounds like it is only transmitting when a change has been performed.
Regards Maik
Hello Maik, some hints from my side. hint1: I have in my plane a KRT2 which works perfect with the F2R-Module. F2R has Datatransfer only to the radio not reverse. What I know is, that Becker Radio needs both directions. hint2: I know somebody who was successful to link ACD and KRT2 and F2R. The break through came with configuration "GTR225" on ACD side and SD-side... even its a KRT2. hint3: the datastream for the radio comes via ACD connector1 pin2 (in his case from F2R-device, but that shouldn´t matter, irxon should also work) hint4: ACD-Softwareversion should not be older than 45 hint5: Baudrate must be set to 9600Baud
Even I personally do not own a ACD, I hope this helps.... regards Ulli
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By Laycom - 1/14/2025 10:47:08 PM
+x+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael Thanks to bsdchapman, the fleet has received a new member - the GENERIC-E adapter.
 This is a very small Bluetooth BLE adapter for SkyDemon that you can wire yourself.It has a 9-pin standard V24/RS323 pinout. It can do MultiDrop, supply voltage 8 - 28 V, and glows in the dark - that was nonsense. But the rest is true 32 x 32 mm footprint. M3 or 4/40 UNC screws. Please specify when ordering.
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By Diplomat - 1/18/2025 12:55:32 PM
Hello, first of all, Michael's BLE adapter for the Becker works great. While I'm not lazy when it comes to soldering, the adapter is ultimately a quick and very well-thought-out solution that saved me the trouble of gathering all the components. The frequency switching works perfectly. His website is: sdlink.de
Now, another question: I'm considering connecting Skydemon to my Stratux via BLE in the future since I occasionally experience disconnects with automatic reconnects when using WiFi-Direct. Before I keep experimenting: Can Android 14 with Skydemon (latest beta) actually maintain two BLE connections simultaneously—one to the BLE adapter for frequency switching and one to the Stratux? Has anyone already tested this?
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By Laycom - 1/18/2025 1:10:32 PM
+xHello, first of all, Michael's BLE adapter for the Becker works great. While I'm not lazy when it comes to soldering, the adapter is ultimately a quick and very well-thought-out solution that saved me the trouble of gathering all the components. The frequency switching works perfectly. His website is: sdlink.de Now, another question: I'm considering connecting Skydemon to my Stratux via BLE in the future since I occasionally experience disconnects with automatic reconnects when using WiFi-Direct. Before I keep experimenting: Can Android 14 with Skydemon (latest beta) actually maintain two BLE connections simultaneously—one to the BLE adapter for frequency switching and one to the Stratux? Has anyone already tested this? Thanks for the praise, I'm very pleased. Now to your question: I operated 2 BLE adapters in parallel for 24 hours in the test. One adapter for the Becker AR6201 and one for the KRT2. Setting the frequencies works simultaneously on both devices, even though they are 2 separate BLE receivers.I haven't tried it with a Stratux yet, but I think it will work.
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By Laycom - 1/31/2025 9:15:13 PM
+xHello, first of all, Michael's BLE adapter for the Becker works great. While I'm not lazy when it comes to soldering, the adapter is ultimately a quick and very well-thought-out solution that saved me the trouble of gathering all the components. The frequency switching works perfectly. His website is: sdlink.de Now, another question: I'm considering connecting Skydemon to my Stratux via BLE in the future since I occasionally experience disconnects with automatic reconnects when using WiFi-Direct. Before I keep experimenting: Can Android 14 with Skydemon (latest beta) actually maintain two BLE connections simultaneously—one to the BLE adapter for frequency switching and one to the Stratux? Has anyone already tested this? Yay, good news! The iOS version for release 4.0.2.0 is available. The Becker AR620X can now also be controlled from the iPad. Thanks Tim.I don't know if I should say it like this here, but there is a site that lists all kinds of adapters for radios related to SkyDemon. I know this is advertising. I ask for forgiveness. www.SDlink.de
Cheers.
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By Laycom - 2/1/2025 10:37:14 PM
+x+xHello, first of all, Michael's BLE adapter for the Becker works great. While I'm not lazy when it comes to soldering, the adapter is ultimately a quick and very well-thought-out solution that saved me the trouble of gathering all the components. The frequency switching works perfectly. His website is: sdlink.de Now, another question: I'm considering connecting Skydemon to my Stratux via BLE in the future since I occasionally experience disconnects with automatic reconnects when using WiFi-Direct. Before I keep experimenting: Can Android 14 with Skydemon (latest beta) actually maintain two BLE connections simultaneously—one to the BLE adapter for frequency switching and one to the Stratux? Has anyone already tested this? Yay, good news! The iOS version for release 4.0.2.0 is available. The Becker AR620X can now also be controlled from the iPad. Thanks Tim.I don't know if I should say it like this here, but there is a site that lists all kinds of adapters for radios related to SkyDemon. I know this is advertising. I ask for forgiveness. www.SDlink.de
Cheers.
Are there actually any GNS 430 / 530 users who want to use this small (useful) feature? I know Garmin 430 / 530 is one of the “bigger irons”. I would have to use the ARINC 429 protocol for this. Should I try it, or is it of no interest.
Inquiring greetings Michael
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By Bouwair - 2/5/2025 12:46:21 AM
What a great solution from the SD team. We have the BT587 solution with a step down converter from 12v to 5v. I made a small housing for these 2 units. It all work perfectly with a Garmin G5 and the Trigg radio. Off course the next question pops up. Can we also get the VNAV function on the G5 working.
With great respect to the Team and other forum members Greeting from Freerk
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By Clive - 2/20/2025 8:51:32 AM
Just read all 19 pages....Great work all of you. My hangar mate has all the hardware installed and the BT unit is flashing at the right times and all looks good. We have the tablet looking like it is sending the radio freq to the radio but there is no reaction on the radio. My question is: is the black banner that flashes across the SkyD screen when you send a freq coming back from the radio or is it SkyD derived? The Radio is a Filser 833AT or what ever. There is nothing in it's menu of manual referring to 232 inputs so I can't find anything in the radio that might need 'setting up', everything on the tablet end looks fine. Has anyone got a Filser radio working with the Freq transfer?
thanks Clive
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By Clive - 2/20/2025 8:56:58 AM
+xJust read all 19 pages.... Great work all of you. My hangar mate has all the hardware installed and the BT unit is flashing at the right times and all looks good. We have the tablet looking like it is sending the radio freq to the radio but there is no reaction on the radio. My question is: is the black banner that flashes across the SkyD screen when you send a freq coming back from the radio or is it SkyD derived? The Radio is a Filser 833AT or what ever. There is nothing in it's menu of manual referring to 232 inputs so I can't find anything in the radio that might need 'setting up', everything on the tablet end looks fine. Has anyone got a Filser radio working with the Freq transfer?
thanks Clive Or even a Funke 833
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By Laycom - 2/20/2025 10:45:10 AM
+xJust read all 19 pages.... Great work all of you. My hangar mate has all the hardware installed and the BT unit is flashing at the right times and all looks good. We have the tablet looking like it is sending the radio freq to the radio but there is no reaction on the radio. My question is: is the black banner that flashes across the SkyD screen when you send a freq coming back from the radio or is it SkyD derived? The Radio is a Filser 833AT or what ever. There is nothing in it's menu of manual referring to 232 inputs so I can't find anything in the radio that might need 'setting up', everything on the tablet end looks fine. Has anyone got a Filser radio working with the Freq transfer?
thanks Clive Hi Clive, the black banner across the SD screen comes from SD itself. Every ATR833 should work. What type of BLE-Dongle do you use?
Michael
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By Laycom - 2/20/2025 11:19:57 AM
+xHi, Does anyone have any information of how to upload frequencies to the Icom A220TSO? It does have a TXD and RXD pins on its 25way D and it also mentions that it can get frequency data from Garmin GPS units. I have spoken to Icom support but they don't know anything useful. On the older Icom units there was a stereo 2.5mm jack that had the serial lines but apparently the 2.5mm jack on the A220TSO is for Aux Audio??? Anyone can help? Hi John, I don't know this device myself and don't have a device to try out. But if it says somewhere that Garmin devices can set the frequency, then it can only be the GTR 225 protocol. I would get a BLE adapter with RS232 and connect it. Then you know where you stand.
Michael
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By Clive - 2/20/2025 11:58:11 AM
Hi Michael, my hangar mate is at the airfield double checking his connections. BT578 V31 IRXON is the unit we were getting a transmit indication on the comms LED. I'll let you know what he finds, Thanks Clive
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By Petertel - 2/20/2025 1:39:06 PM
Hello, first I introduce myself since it is my first intervention in this forum. My name is Pedro, I am from Spain, I have an ultralight plane and I like to fly and program my own instruments for my plane.
I am building the Bluetooth adapter to be able to send the autopilot information from Skydemon to an old TRUTRAK DIGIFLIGHT II autopilot but it is not capable of recognizing the NMEA sentences that the Skydemon sends it.
I have been analyzing the NMEA sentences that the Garmin GPSMAP 296 GPS sends and they are like this:
$GPRMC,111231,A,4041.3941,N,00036.84755,W,0.0,227.3,190225,0.8,W,D*11 $GPRMB,A,0.00,R,,EDNT,4859.7560,N,01053.0926,E,656.923,44.7,,V,D*41 $GPRMC,111232,A,4041.3941,N,00036.84755,W,0.0,227.3,190225,0.8,W,D*12 $GPRMB,A,0.00,R,,EDNT,4859.7560,N,01053.0926,E,656.923,44.7,,V,D*41 $GPRMC,111233,A,4041.3941,N,00036.84755,W,0.0,227.3,190225,0.8,W,D*13 $GPRMB,A,0.00,R,,EDNT,4859.7560,N,01053.0926,E,656.923,44.7,,V,D*41
However, the NMEA sentences that Skydemon currently throws are like this:
$GPRMC,111343,A,41$GPRMB,A,0.76,R,OR$GPRMC,111344,A,41$GPRMB,A,0.76,R,OR$GPRMC,111345,A,41$GPRMB,A,0.76,R,OR$GPRMC,111346,A,41$GPRMB,A,0.76,R,OR$GPRMC,111347,A,41$GPRMB,A,0.76,R,OR$GPRMC,111348,A,41$GPRMB,A,0.76,R,OR$GPRMC,111349,A,41$GPRMB,A,0.76,R,OR$GPRMC,111350,A,41$GPRMB,A,0.76,R,OR$GPRMC,111351,A,41$GPRMB,A,0.76,R,OR$GPRMC,111352,A,41$GPRMB,A,0.76,R,OR$GPRMC,111353,A,41$GPRMB,A,0.76,R,OR$GPRMC,111354,A,41$GPRMB,A,0.76,R,OR
That is, the NMEA frames of the Skydemon are missing all the information fields and also do not end with CR+LF (0x0D + 0x0A) so the TRUTRAK autopilot is not able to interpret the NMEA sentences correctly.
Could you please check and correct it.
PD.- Thank you very much Tim for having implemented the new Bluetooth functions, it is something that has been needed for a long time to be able to use Skydemon as the main route planning source.
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By Tim Dawson - 2/20/2025 2:49:12 PM
SkyDemon certainly does terminate NMEA sentences with CR-LF. Otherwise, they wouldn't work!
To me the corrupted output you're showing indicates a problem with your BLE device or its configuration, or possibly a baud rate issue.
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By Petertel - 2/20/2025 3:46:56 PM
Hello Tim, the transmission is at 9600, and analyzing the radio channel change frames, they do come out with CR+LF as you can see in the image. The only ones that do not come out with CR+LF are the NMEA ones. The first image is with radio only output, and the second is with radio and autopilot. The third image is a capture of hex data in which it can be seen that the GPS frames do not add CR+LF and the frames is not full data.
A baud rate error is not possible since then they would all be wrong.
I use an Android tablet.
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By Clive - 2/20/2025 10:42:52 PM
A case of very small writing and parallax error was the problem with my hangar mates connection. D connectors are truly the devils work…. Now fixed and all working fine with the Funke. We were discussing how we still won’t have the solution to a load of twiddling when cross country in France tho.
I was particularly interested in Pedro’s comments and discussion as I’ve just submitted my paperwork for my Trutrak A/P. So I’ll watch with interest the resolution. Currently I have an old G195 which happily drives my Trutrak but the SkyD version was my Hope! I’ll buy the beers Pedro when you get it working if I can blag the resolution of you, and Tim. Hope to be in Spain in the summer touring about. Thanks everyone, regards Clive
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By SeanKx - 2/21/2025 8:26:02 AM
If anyone is still tinkering I have an unused Irxon BT758 Bluetooth Module with mini gender changer available £7 to include UK postage. Have bought a ready made solution https://prodimex.co.uk/products/simpleble-for-trig-ty91-and-ty92-radios
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By john123 - 2/21/2025 11:26:41 PM
Hi Sean I would be interested in your spare BT758 not sure how to contact you privately with address details and get info to pay you
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By SeanKx - 2/22/2025 8:48:59 PM
Just another thought for radio frequencies via bluetooth. Could we have 121.500 always listed and colour coded in the available frequencies list when flying? Most modern handhelds have a dedicated 121.5 button and if Skydemon could list it too it may be useful for someone?
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By john123 - 2/23/2025 10:19:04 PM
Hi Sean I would be interested in your spare BT758
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By SeanKx - 2/23/2025 10:25:36 PM
+xHi Sean I would be interested in your spare BT758 Hi John, Still have it - ping me a message on here and we can sort?
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By bsdchapman - 2/23/2025 10:40:55 PM
Well, I installed the beautiful SDLink on to the back of my KRT2 and it left me with an instant grin as a tap on SD resulted in a frequency and station name appearing on the radio display before I'd even taken my finger off the screen!!!Very happy. A lovely time, space, and wire-saving product.
Next step was to take a feed from the existing RS232 line out of the back of the original connector, and hook it up to my autopilot, a TruTrak Digiflight II. This was not so easy! Wires to be cut, spliced etc, all behind a panel.
And it doesn't want to play. The AP keeps reporting "NO GPS". The baud rate is 9600 (fixed by the KRT2 spec). Also tried 4800 too, still doesn't like it. So I delved deeper and pluged in a serial port adapter in to my laptop, hit up terminal, and attempted to capture the output to see what was being sent through. To run this test, I set SD to only send autopilot messages, just in case the A/P was throwing out the radio frequency messages.
All I get is:
$GPGLL,5230.8752,N $GPBOD,94.6,T,94.5 $GPBWC,151315,5240 $GPVTG,243.9,T,243 $GPXTE,A,A,9.99,L, $GPAPB,A,A,9.99,L, $GPRMB,A,9.99,L,EG $GPGGA,151325,5230 $GPGSA,A,3,,,,,,,,
The first sentance is definately not to spec. Should start with the date, let alone be missing everything after the latitute! Can anyone shed any light on this?
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By Petertel - 2/24/2025 6:27:20 AM
+xHello, first I introduce myself since it is my first intervention in this forum. My name is Pedro, I am from Spain, I have an ultralight plane and I like to fly and program my own instruments for my plane. I am building the Bluetooth adapter to be able to send the autopilot information from Skydemon to an old TRUTRAK DIGIFLIGHT II autopilot but it is not capable of recognizing the NMEA sentences that the Skydemon sends it. I have been analyzing the NMEA sentences that the Garmin GPSMAP 296 GPS sends and they are like this: $GPRMC,111231,A,4041.3941,N,00036.84755,W,0.0,227.3,190225,0.8,W,D*11 $GPRMB,A,0.00,R,,EDNT,4859.7560,N,01053.0926,E,656.923,44.7,,V,D*41 $GPRMC,111232,A,4041.3941,N,00036.84755,W,0.0,227.3,190225,0.8,W,D*12 $GPRMB,A,0.00,R,,EDNT,4859.7560,N,01053.0926,E,656.923,44.7,,V,D*41 $GPRMC,111233,A,4041.3941,N,00036.84755,W,0.0,227.3,190225,0.8,W,D*13 $GPRMB,A,0.00,R,,EDNT,4859.7560,N,01053.0926,E,656.923,44.7,,V,D*41 However, the NMEA sentences that Skydemon currently throws are like this: $GPRMC,111343,A,41$GPRMB,A,0.76,R,OR$GPRMC,111344,A,41$GPRMB,A,0.76,R,OR$GPRMC,111345,A,41$GPRMB,A,0.76,R,OR$GPRMC,111346,A,41$GPRMB,A,0.76,R That is, the NMEA frames of the Skydemon are missing all the information fields and also do not end with CR+LF (0x0D + 0x0A) so the TRUTRAK autopilot is not able to interpret the NMEA sentences correctly. Could you please check and correct it. PD.- Thank you very much Tim for having implemented the new Bluetooth functions, it is something that has been needed for a long time to be able to use Skydemon as the main route planning source. Hello, in my previous post I forgot to say that the tests were done with an HM-10 bluetooth module, just in case it was the problem with the module, I just bought the following adapter on Amazon: DSD TECH HM-18, since I have seen that there are colleagues who have bought it and it is working well. As soon as it arrives and I do the tests, I will inform you of the results.
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By Tim Dawson - 2/24/2025 11:49:45 AM
Petertel and Ben, SkyDemon is sending full sentences but clearly they are being truncated somewhere. Are you on Android or iOS?
Petertel I look forward to hearing the results of your test. It's possible there is a MTU related problem where everything we send after the first X characters is simply being discarded.
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By Laycom - 2/24/2025 6:41:11 PM
+xPetertel and Ben, SkyDemon is sending full sentences but clearly they are being truncated somewhere. Are you on Android or iOS?
Petertel I look forward to hearing the results of your test. It's possible there is a MTU related problem where everything we send after the first X characters is simply being discarded. Dear community, I started a test with 3 HM-10 modules from different brands to send autopilot data on an Android Lenovo M11 tab and an iPad Pro, with interesting results. These are the BLE-Modules: The modules look the same at first glance, but there are subtle differences. To be clear, all of these modules work to set the radio frequencies in SkyDemon without any problems.
But now to the result of the output of the autopilot data via these modules. I've always used the same scenario: start the simulation (which brings us close to Tim's HQ) and then a direct-to "Watchford Farm".
1.) DSD-TECH Modul with iPad (looks good!)
1.) DSD-TECH Modul with Android (truncated !)
3.) MLT-BT08 with iPad (different sentences but look good)
4.) MLT-BT08 with Android (nearly the same)
5.) BT05 with iPad (truncated no CR LF)
6.) BT05 with Android (truncaded)
That's surprising, isn't it? SkyDemon versions used: The Lenovo M11 runs 4.0.2.0 and on the iPad and iPhone it's 4.0.4.405.
Regards Michael
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By Petertel - 2/25/2025 10:42:17 AM
+xPetertel and Ben, SkyDemon is sending full sentences but clearly they are being truncated somewhere. Are you on Android or iOS?
Petertel I look forward to hearing the results of your test. It's possible there is a MTU related problem where everything we send after the first X characters is simply being discarded. Hello, I am using a Samsung Galaxy S20 mobile with Android 13 but I have also tried with 2 older Android tablets and the results are the same. I have been finding out that the MTU of the CC2541 bluetooth modules that are used by the HM-10 is 20 bytes, but the datasheet clearly indicates that the data packet that can be sent is larger and the module is responsible for packetizing and sending all the data on its own, so this should not be the problem. And the truncated data is exactly 18 bytes in all error frames.
Additionally, I have tried using an app like nRF to send a data packet much larger than 20 bytes to the HM-10, and it receives all the data perfectly.
And finally, with the tests that Michael has been able to do with various HM-10 models and Android and iPad, it is very curious how the MLT-08 works well with Android and iPad.
Michael, can you look at what Bluetooth chip have each of the 3 modules you have tested have?. It is possible that the problem is there.
Regards, Peter.
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By Laycom - 2/25/2025 7:10:55 PM
+x+xPetertel and Ben, SkyDemon is sending full sentences but clearly they are being truncated somewhere. Are you on Android or iOS?
Petertel I look forward to hearing the results of your test. It's possible there is a MTU related problem where everything we send after the first X characters is simply being discarded. Hello, I am using a Samsung Galaxy S20 mobile with Android 13 but I have also tried with 2 older Android tablets and the results are the same. I have been finding out that the MTU of the CC2541 bluetooth modules that are used by the HM-10 is 20 bytes, but the datasheet clearly indicates that the data packet that can be sent is larger and the module is responsible for packetizing and sending all the data on its own, so this should not be the problem. And the truncated data is exactly 18 bytes in all error frames.
Additionally, I have tried using an app like nRF to send a data packet much larger than 20 bytes to the HM-10, and it receives all the data perfectly.
And finally, with the tests that Michael has been able to do with various HM-10 models and Android and iPad, it is very curious how the MLT-08 works well with Android and iPad.
Michael, can you look at what Bluetooth chip have each of the 3 modules you have tested have?. It is possible that the problem is there.
Regards, Peter.
Hi Peter, all 3 BLE clones use (or claim to use) a TI CC2541.
  
But the firmware versions are different:
I tried sending longer data packets with the DSD TECH app on iPhone, it worked without any problems with all modules. Maybe there's something wrong with the BLE stack in SkyDemon. The different behavior between the Android and iOS versions also suggests this. Just a guess. Maybe Tim has an idea.
Regards Michael
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By Petertel - 2/25/2025 8:08:25 PM
Hello, I received the DSD TECH module this afternoon and I just did the tests. The result is this with android phone:
$GPRMC,192851,A,4200.7607,N,00333.3039,W,0.0,-18.7,250225,0.0,E,A*19 $GPRMB,A,9.99,L,LETO,LEVD,4142.3667,N,00451.1167,W,178.673,272.2,0.0,V,A*46 $GPRMC,192852,A,4200.7629,N,00333.3044,W,0.0,-18.1,250225,0.0,E,A*1A $GPRMB,A,9.99,L,LETO,LEVD,4142.3667,N,00451.1167,W,178.673,272.2,0.0,V,A*46 $GPRMC,192853,A,4200.7659,N,00333.3005,W,0.0,-17.8,250225,0.0,E,A*1F $GPRMB,A,9.99,L,LETO,LEVD,4142.3667,N,00451.1167,W,178.676,272.2,0.0,V,A*43
That is, it works perfectly and does not truncate the data.
This is the HM-10 clone module that has the CC2541 chip, it does not work well.
 And this is the DSD TECH HM-18 chip, a CC2640.
 Now I'm almost sure that it may be a problem with the module's firmware, I'm going to see if I could change the firmware version of the HM-10, although it will be difficult since it is not original but a clone.
Regards.
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By bsdchapman - 2/26/2025 12:27:31 PM
+xPetertel and Ben, SkyDemon is sending full sentences but clearly they are being truncated somewhere. Are you on Android or iOS?
Petertel I look forward to hearing the results of your test. It's possible there is a MTU related problem where everything we send after the first X characters is simply being discarded.
My setup was tested with both iOS and iPadOS. Also, I added the line breaks into the post. The raw data didn’t contain any CR/LF.
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By Laycom - 3/1/2025 7:54:36 AM
In response to the issues we were experiencing with truncated autopilot data sets, we decided to switch to Bluetooth 5.0. The Generic (Universal) Adapter is now the first SD-Link adapter to be delivered with BLE V5.0. The other products will follow. To be clear, setting radio frequencies also works with BLE V4.0 without any problems.
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By Petertel - 3/3/2025 7:15:31 AM
+xHello, I received the DSD TECH module this afternoon and I just did the tests. The result is this with android phone:
$GPRMC,192851,A,4200.7607,N,00333.3039,W,0.0,-18.7,250225,0.0,E,A*19 $GPRMB,A,9.99,L,LETO,LEVD,4142.3667,N,00451.1167,W,178.673,272.2,0.0,V,A*46 $GPRMC,192852,A,4200.7629,N,00333.3044,W,0.0,-18.1,250225,0.0,E,A*1A $GPRMB,A,9.99,L,LETO,LEVD,4142.3667,N,00451.1167,W,178.673,272.2,0.0,V,A*46 $GPRMC,192853,A,4200.7659,N,00333.3005,W,0.0,-17.8,250225,0.0,E,A*1F $GPRMB,A,9.99,L,LETO,LEVD,4142.3667,N,00451.1167,W,178.676,272.2,0.0,V,A*43
That is, it works perfectly and does not truncate the data.
This is the HM-10 clone module that has the CC2541 chip, it does not work well.
 And this is the DSD TECH HM-18 chip, a CC2640.
 Now I'm almost sure that it may be a problem with the module's firmware, I'm going to see if I could change the firmware version of the HM-10, although it will be difficult since it is not original but a clone.
Regards. Hello, very good news. This weekend I was able to test the new DCD TECH module with the CC2640 chip and it works perfectly with a TRUTRACK DIGIFLIGHT II autopilot and with a Garmin GTR225 radio. With these latest tests, we can confirm that if the NMEA sentences come out well on the workbench without truncating, it is certain that they will work well on the plane.
Greetings.
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By vikino - 3/5/2025 6:56:59 PM
+xHello Tim, have you got any time schedule about programming ability to send AP+COM and receive traffic via single BT-RS232? Just to know if i should wire second BT device or you can get it to work in near future?
Vitek
Hello Tim, are there some news about this? Vitek
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By Final glide - 12/21/2024 5:55:02 PM
 
So for the AV-30 no avlink needed just the data wire I have four data wires running off one BT unit !!
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By Elric - 12/22/2024 11:10:43 AM
Hi,
I have a TY96 and a IRXO 578 V3. Is the RS-232 Connection straigth thru (RX to RX and TX to TX or is it crossed: RX - TX and TX-RX) ?
Thanks a lot in advance !
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By Final glide - 12/22/2024 11:32:31 AM
Hi I did TX to RX from the BT to the AV-30 ETC With a common ground line from BT to the main power supply ground for the instruments
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By Laycom - 12/22/2024 8:16:04 PM
+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM.
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By Dortro - 12/23/2024 8:01:03 AM
Super! I am interested and have a KRT2, but…I am in the Netherlands.
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By Bathman - 12/26/2024 9:44:57 AM
Is it or will it be possible to have this feature so skydemon can change the frequency on an icom or Yaesu handheld radio?
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By ALSL-Flyer - 12/26/2024 1:45:09 PM
+x  So for the AV-30 no avlink needed just the data wireI have four data wires running off one BT unit !! Hello Final glide, thank you very much for your post about the AV-30. I have also AV-30 in my plane and I already connected my KRT2 with SD. So it´s great, that you managed to bring AV-30 and SD together. I would like to follow you. It would be great if you could share a bit more details. My questions are: - is it Pin2 at AV-30 which is used for Data-in? - what is the configuration an SD-side. Does it need "Autopilot" or "NMEA" ? - any configuration on AV-30 side to be changed? e.g. baud rate? is it 9600? Thanks a lot for your support Ulli
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By Final glide - 12/26/2024 7:00:01 PM
Hi ulli It is super simple pins 1,2,and 9 for the av-30 And that’s it select autopilot and all on the SD it does 9600 bad automatically You can test by using the simulator function on SD Brilliant system !!!!!
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By norland - 12/26/2024 8:52:41 PM
Is there an estimated release date for IOS with Becker support?
Got the DSD TECH HM-10 dongle and it seems to easily connect straight out of the box to Skydemon, I powered it up temporarily and can see it outputting autopilot and radio strings when I play with it using Garmin protocol, so keen to know when the Becker radio support is coming.
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By Laycom - 12/27/2024 8:03:49 PM
+xIs there an estimated release date for IOS with Becker support? Got the DSD TECH HM-10 dongle and it seems to easily connect straight out of the box to Skydemon, I powered it up temporarily and can see it outputting autopilot and radio strings when I play with it using Garmin protocol, so keen to know when the Becker radio support is coming. Tim told me iOS support for AR620X will come in the 4.0.2 branch as it is implemented in the 4.0.2 (android) beta yet. Don't know when this final will be released. Maybe Tim will answer here.
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By ALSL-Flyer - 12/29/2024 2:53:44 PM
+xHi ulli It is super simple pins 1,2,and 9 for the av-30 And that’s it select autopilot and all on the SD it does 9600 bad automatically You can test by using the simulator function on SDBrilliant system !!!!! Thanks a lot... I will check it out. Great hint!!!
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By Paul Milling - 12/30/2024 4:52:47 PM
Does the IRXON device need to have a ground wire on the 9 Pin D-Sub given that the device itself has its own power (ie., battery) or it can be powered by a USB cable connected to a panel-mounted USB charger outlet which is already grounded?
Just checking as I'm planning to connect it to my Trig TC90 Head and wanted to know if I just needed an RX/TX data wire.
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By Tim Dawson - 3/11/2024 10:37:15 AM
No news at the moment. It simply isn't something that is requested a great deal, so at the moment we are busy on other things.
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By Tim Dawson - 9/2/2024 9:54:50 AM
That should work just fine Paul. You can have virtually any number of Bluetooth devices connected.
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By PaulSS - 9/2/2024 2:21:03 PM
Thanks Tim. I think Bluetooth gets a bit antsy when it comes to multiple audio devices but one audio + a couple of BT to RS232 dongles sounds like a good plan.
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By I_Need_Help - 9/2/2024 3:28:07 PM
+xSkyDemon uses Bluetooth low energy (BLE). There's no pairing process, there's no SPP, it requires pretty much no configuration, so it's very easy.
BLE to RS232 has a defined service and characteristic UUID (one for each) which you should be able to find online. @Tim there doesn't seem to be a defined BLE serial UUID, only for classic BT. Could you point me to the UUID serial spec you are using?
We can see our device in SkyDemon and it connects but then complains about the service.
Many thanks
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By I_Need_Help - 9/2/2024 7:55:39 PM
+x+xSkyDemon uses Bluetooth low energy (BLE). There's no pairing process, there's no SPP, it requires pretty much no configuration, so it's very easy.
BLE to RS232 has a defined service and characteristic UUID (one for each) which you should be able to find online. @Tim there doesn't seem to be a defined BLE serial UUID, only for classic BT. Could you point me to the UUID serial spec you are using?
We can see our device in SkyDemon and it connects but then complains about the service.
Many thanks We are advertising the service UUID 0xFFE0 (0000FFE0-0000-1000-8000-00805F9B34FB) and SkyDemon can see the device, it appears in the list when we go to Connectivity -> Add Bluetooth Device. When we try and connect, we can see SkyDemon connecting to the device and performing some negotiation steps, but it quickly fails with the error message “No serial port service found”. We are assuming that this is because it can’t find the characteristics it’s expecting, those with suitable read/write/notify permissions. Can you give us some insight into what SkyDemon is looking for when it tries to validate that the BLE device is indeed providing a “serial port service” (we’re using BLE so it's not the Bluetooth Classic SPP protocol we’re trying to provide)?
It’s our understanding that the client device would normally look for write and notify permissions on one or more of the characteristics. We can connect other software (the python ble-serial module for example) to our device and communicate with it as if it were a serial port adapter. Our device is currently providing a characteristic with UUID 0xFFE1 (0000ffe1-0000-1000-8000-00805f9b34fb) with WRITE, WRITE_WITHOUT_RESPONSE and NOFIFY permissions.
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By Kilo Lima - 9/3/2024 9:12:11 AM
+xHi,
I’m wondering where you connect the 5v supply for the Bluetooth module in your aircraft?
Thanks! Any idea please? Thanks for your help!
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By I_Need_Help - 9/3/2024 9:15:58 AM
+x+xHi,
I’m wondering where you connect the 5v supply for the Bluetooth module in your aircraft?
Thanks! Any idea please? Thanks for your help! That will depend on your aircraft type and what rules you operate under e,.g. certified, LAA or BMAA
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By Tim Dawson - 9/3/2024 9:19:57 AM
I_Need_Help
Once we connect to the device the first thing we do is list its services, and look for the one matching FFE0. If we don't find it, that's when the connection will be aborted with "No serial port service found.".
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By norland - 9/3/2024 11:37:27 AM
Can anyone confirm if the available protocols work with a Becker AR6201, and they have it working.
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By norland - 10/12/2024 2:33:33 PM
+x+xAll,
I was very excited when I read about the feature in the Skydemon release note, went right into ordering parts and figured I share the experience here.
Top 1 priority for me was to get the radio (f.u.n.k.e. ATR833-II) connected. So I designed a 3d case that perfectly fits on top of the original Sub-D connector housing and uses the existing screw holes (only needed slightly longer screws). Once mounted, it sits below the connector at the back of the radio and doesn't block anything else / basically uses the same space.
I decided to use a HM-18 BLE to serial module. It is very power efficient and therefore I could easily use the 5V the radio provides on the Sub-D connector. The HM-18 is outputting TTL serial, hence I added a MAX3232 converter to provide the proper RS232 levels the radio expects.
Put everything together and it worked right away. For me it's almost a killer feature in Skydemon as it makes my life so much more simple during flight. A big thx to Tim and his team for adding this feature!
Hi moefly,
according to HM-18 datasheet the power supply voltage is from 1.9V to 3.7V. The ATR833 has 5V output. Do you use a voltage converter or do you just run out of specs?
Regards, Tobi
The same module is on Amazon uk for £12, it says Vcc is 3.6V to 6.0V.
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By tobi - 10/13/2024 9:39:28 AM
+x+x+xAll,
I was very excited when I read about the feature in the Skydemon release note, went right into ordering parts and figured I share the experience here.
Top 1 priority for me was to get the radio (f.u.n.k.e. ATR833-II) connected. So I designed a 3d case that perfectly fits on top of the original Sub-D connector housing and uses the existing screw holes (only needed slightly longer screws). Once mounted, it sits below the connector at the back of the radio and doesn't block anything else / basically uses the same space.
I decided to use a HM-18 BLE to serial module. It is very power efficient and therefore I could easily use the 5V the radio provides on the Sub-D connector. The HM-18 is outputting TTL serial, hence I added a MAX3232 converter to provide the proper RS232 levels the radio expects.
Put everything together and it worked right away. For me it's almost a killer feature in Skydemon as it makes my life so much more simple during flight. A big thx to Tim and his team for adding this feature!
Hi moefly,
according to HM-18 datasheet the power supply voltage is from 1.9V to 3.7V. The ATR833 has 5V output. Do you use a voltage converter or do you just run out of specs?
Regards, Tobi
The same module is on Amazon uk for £12, it says Vcc is 3.6V to 6.0V. You're right. Thanks for the response. Even on DSD Tech homepage you'll find: Work voltage(VCC): 3.6V to 6V TTL logic level (TX, RX): 3.3V But on the linked datasheet you'll read: Power: +1.9~3.7 VDC 50mA I'll just try it.
Thanks, Tobi
TTL logic level (TX, RX): 3.3V
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By zooyork - 10/13/2024 7:33:14 PM
Hello,
first off, thank you for including such a nice feature! Now to my problem  ... Since several people reported that the DSD TECH bluetooth adapters work also fine, I ordered them as well. And in my opinion I did almost everything to get it working, but is is not.
My setup: DSD Tech HM-10 Trig TY 96 (to test the feature in the aircraft) Trig TY 91 (to test the feature at the bench)
What is done and working: - HM-10 connect succesfully to skydemon - wiring done correctly to serial inferface of the radios - I also tested the setup using my computer and a serial monitor (e.g. for clicking on the Bournemouth Approach frequency 119,480 in Skydemon I receive the following message $PGRMC01GC014< on my serial monitor)
What is not working: When I do this with my Trig radios.
What I think what could be the problem: The DSD Tech adapters can not handle a power supply of 5V from a different source than ground and rx signals are coming from. My usb-serial converter which I use on my computer provides vcc, ground, rx, tx from one source which is my computer. For the Trig radios thats a different story since they do not offer 5V output. So you have to get the 5V from another souce in your aircraft and that does not work. Maybe I'm completley wrong.. For the Funke ATR833 radio this problem does not exsist, since it offers a 5V output on pin 24 and therefore all signals that go to the bluetooth adapter come from one single source which is the ATR833. So far im guessing that only the IRXON adapter works with Trig radios, since it has a internal battery and can accept powering from external source.
My questions would be: - Did someone succesfully connected a DSD TECH bluetooth adapter with a Trig radio? - Did someone sucessfully connected a DSD TECH bluetooth adapter that is powered externally to any of the other features Skydemon offers using this functionality (auto pilot commands, traffic / gps information)? - Is $PGRMC01GC014< the right received message to Bournemouth Approach frequency of 119,480?
Any feedback is much appreciated. Thank you!
Rob
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By zooyork - 10/14/2024 9:19:55 AM
Forget my last post. The problem has been identified. Thanks to user Michael Hoffmann for the clarification. If I had read the thread carefully I would have come across this post from user meofly:"The HM-18 is outputting TTL serial, hence I added a MAX3232 converter to provide the proper RS232 levels the radio expects."
This is also true for HM-10 and probably most of the adapters.
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By vikino - 10/14/2024 4:20:31 PM
+xHi all
If anybody is connecting the BT receiver to the TruTrak 385 autopilot, I would be interested to hear. It's currently getting GPS feed from an old and useless AvMap Geo Pilot II+ that I would like to replace It seems that it may need engineer from avionics specialist but I would like to do it myself (flying non certified) because from what I see on Skydemon manual, it seems pretty simple. Pins connecting to Ground on both side, Rx Pin on autopilot connecting to Tx on BT receiver. On Irxon BT578, pin 5 is Gd and 3 is Tx, and it can't be rewired. So it probably means to create a RS232 cable if rewired is needed on autopilot RS232. It may be better anyway to avoid plugging the BT receiver directly to the avionics (thinking that it may be a pain if anything has to be done on the receiver if not easily accessible). Any recommandation on the type of wire/cable to be used if needed (shield?)
thanks You can swap rx/tx with M/F switch on irxon, but off course is better to solder simple wiring...
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By Laycom - 10/14/2024 8:59:32 PM
+xCan anyone confirm if the available protocols work with a Becker AR6201, and they have it working. No, it will not work by default.
First, some words about TTL and V24. The mentioned working transceivers (Garmin GTR 225, f.u.n.k.e. ATR833-II, Trig TY 91/96) have a RS-232 interface with V24 voltage level. This means serial transmission with logical low at -12V and high at +12 V (nearly...). The cheap BT-Modules (which work like a charm with the iPad) have TTL voltage level. (low at 0 V , high at + 5V). To connect it to your RS-232 transceiver you need a voltage level converter.
Something like this:
Now to Becker. The AR6201 has an RS-422 interface. RS-422 is electrically different to RS-232 (4 lines, current driven). But it isn't the main problem, there are many converter from TTL to RS-422 available.
The challenge is the implementation of a translator from NMEA (ASCII) PGRMC sentences to the in-house Becker protocol. I found an Open Source solution used in the LK8000:
There should be any information needed for such a piece of software... I can't wait to try it out when I can have an AR6201 outside of the plane.
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By SeanKx - 12/5/2024 6:34:49 PM
Have received my Irxon dongle but daunted by patching into the 25pin dsub connector on my Trig radio; not least by trying to get to it as everything is rather buried behind the panel.
Was wondering if it would be possible to wire the dongle into a dsub adapter which could then be used to connect to the radio ie Trig dsub connector into adapter which then connects to radio hardware box.
One like this wired correctly? https://www.amazon.co.uk/CY-Adapter-Parallel-Extension-Connector/dp/B0CWH7NQMY?th=1
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By Laycom - 12/5/2024 9:32:54 PM
+xHave received my Irxon dongle but daunted by patching into the 25pin dsub connector on my Trig radio; not least by trying to get to it as everything is rather buried behind the panel.
Was wondering if it would be possible to wire the dongle into a dsub adapter which could then be used to connect to the radio ie Trig dsub connector into adapter which then connects to radio hardware box.
One like this wired correctly? https://www.amazon.co.uk/CY-Adapter-Parallel-Extension-Connector/dp/B0CWH7NQMY?th=1
It looks like all 25 pins are routed 1:1 "around the 90 degree corner". But I can't read that anywhere. It will probably work.
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By Wolfram Schiffmann - 12/6/2024 6:02:22 PM
+xOr maybe more user and installation friendly is IRXON BT578 v3 or BT580, they work with Apple and Android well... Hi, I purchase that device from AliExpress. Unfortunately, it doesn‘t react to AT+MODE=BLE in order to switch the Bluetooth mode to Low Energy. The connection to my tester-app terminal works because I get OK in reply to a sole AT command. Any idea how to fix this problem? I need LE because the iPad will not connect to BT. Thanks and best regards, Wolfram
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By Skyboy999 - 6/21/2024 7:42:30 AM
I would be happy to help. I have SD running on iPad Mini 4 and would want to connect to Dynon Skyview touch. Im reasonably competent but would need some guidance re hardware and connection.
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By Tim Dawson - 6/21/2024 8:45:54 AM
Thanks, but we already support connections to Dynon Skyviews. Unless I am confused about that products in question?
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By Skyboy999 - 6/22/2024 7:30:09 AM
Present support is to send flight plan from SD to SV via SV wifi. This thread is about real time guidance from SD to drive SV autopilot which, I understood, requires the discussed BT connection etc. Or have I misunderstood? If capability already exists to do this then fantastic- please tell me how!
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By Tim Dawson - 6/24/2024 10:15:34 AM
From what I've heard, people drive their Skyview autopilot from the Skyview itself, having transferred the SkyDemon route on to it.
I do not know that the Skyview autopilot can be disconnected from the Skyview and given commands by other software, but if it can, and it accepts those commands via RS232, then our solution might work.
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By Skyboy999 - 6/25/2024 7:47:03 AM
+xFrom what I've heard, people drive their Skyview autopilot from the Skyview itself, having transferred the SkyDemon route on to it.
I do not know that the Skyview autopilot can be disconnected from the Skyview and given commands by other software, but if it can, and it accepts those commands via RS232, then our solution might work. Yes, you send the SD route to SV via wifi connection from SV then, once on SV, it can drive autopilot etc. but what I'm referring to is effectively using SD as a navigation source into SV so any changes made in SD would be reflected real-time in SV. Perhaps my confusion but that is what I understood the BT connectivity would enable?
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By Tim Dawson - 6/25/2024 9:07:25 AM
I'm afraid we have exceeded my knowledge of how the Skyview can connect to other avionics, sorry. Our forthcoming Bluetooth connectivity will allow SkyDemon to be connected to autopilots that accept GPRMB sentences over RS232 to set the current heading etc.
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By vikino - 6/1/2023 5:02:31 AM
Hi all, there has been a lot of discussions about this, but never resulted in any way.Is it possible, somehow, to get out from SkyDemon over bluetooth to RS232 converter some data? From my current Aera 760 i have over serial port connected autopilot and Trig radio so Aera can feed AP with planned track and when i click on airfields com freq it sets stand by freq. But, it is Garmin and their weird navigation point stupid names, airfields without names and so on...
This will be nice to have on SkyDemon, are there some possibilities? Vitek
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By Gaznel - 10/28/2024 8:33:43 AM
Hi. I cannot get my iPad (mini 5 running version 17.5.1 and SD version 4.0.0.397) to connect to the IRXON Version 3 Bluetooth to beam frequencies to my transceiver (Funke ATR833). However, this works perfectly using my iPhone (also running Sky Demon 4.0.0.397)
On my iPad I go into CONNECTIVITY - ADD BLUETOOTH DEVICE - then all I get is "SkyDemon for iPad Not Authorized" as per below - any thoughts on what I am doing wrong. As I stated above it works perfectly with my iPhone?
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By Tim Dawson - 10/29/2024 10:16:30 AM
You would have been asked, when first trying to use Bluetooth with SkyDemon, whether to give SkyDemon permission to use Bluetooth. It appears you said no (or somebody did) so now SkyDemon does not have permission. You can fix this in the Settings app, probably under Privacy or Bluetooth, where you control which apps are allowed to use Bluetooth.
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By Gaznel - 10/30/2024 6:42:03 AM
Thanks Tim - sure enough going into iPad - Settings - Privacy & Security - Bluetooth - in there, Sky Demon was showing with toggle off for Blue Tooth permission. I have toggled this to green to now give permission. Looking forward to seeing it now work when I next go to airfield 👍🏼
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By bsdchapman - 1/4/2025 2:41:07 PM
+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream?
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By Laycom - 1/4/2025 4:36:32 PM
+x+x+xHi Michael,Thank you very much for both answers, this is very helpful!I was thinking to wire my BT580 to the KRT2 plug, following the diagram for connecting the remote. Your second suggestion sounds very good and, indeed, clean. Would it be expensive?My problem now is that my BT580 ls not detected by SD! I am mailing with Support about it.One of those things, it should detect the device almost immediately, but it does not…Again, thank you! Hello dear community,
the prototype of a TQ KRT2 BLE PnP (PlugAndPray  ) adapter is ready. The advantage of this dongle is that it is powered by the device itself. You don't need any additional wiring. The size is (40 x 45 x 17) mm. Unfortunately I can't make it any smaller. Simply plug this dongle between your existing cables - and you're done. Yes, the correct mounting brackets are included with the final version... I don't have them in stock yet. The screws aren't the right ones either...but that will be solved too.
It is important that the electronics work in this small space. She does. Unfortunately I don't have a KRT2 to test and am therefore looking for a willing tester. Is there anyone with a TQ KRT2 who can test this dongle? I'm looking for a tester in Germany, preferably in the Berlin area.
If you can and want to help here, send me a PM. Can’t help with basic testing (I’m UK based), but would be interested in this as a beta or finished product. The KRT2 is the worst UX I’ve ever come across for a radio!
Also wonder if you would be able to create a package with just 12v / Gnd / Tx / Rx interface - maybe 2-3 RS232 outputs, so we can fit one box, behind the panel, plumbed straight into the electrics (no 5v/usb), with multiple data outputs to run to radios, autopilot, and anything else that would be benefit from a one way data stream? Hello Bsdchapman, thanks for your answer. I have now received a KRT2 from a colleague and was able to test the adapter. Yes, it works. The KRT2 adapter simply plugs between the existing wiring and the radio and is powered by the radio's power supply itself.
No additional wiring or mechanical work required. Something like PnP (Plug and Pray) ;-)).
Look here:
At pin 13 of the connector, the RS-232 output is available for other devices (true V24 voltage) such as autopilots, AV-30, other radios or whatever else comes along. The adapter works in the voltage range of 8 - 30 V and is short-circuit proof.
Is that what you're looking for? Or do you really want a separate box with its own power supply and multiple outputs?
Regards Michael
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By urbino - 1/5/2025 8:13:27 PM
+xDoes the IRXON device need to have a ground wire on the 9 Pin D-Sub given that the device itself has its own power (ie., battery) or it can be powered by a USB cable connected to a panel-mounted USB charger outlet which is already grounded?
Just checking as I'm planning to connect it to my Trig TC90 Head and wanted to know if I just needed an RX/TX data wire.
Dear Paul, I am not a specialist, but just received the IRXON BT578 v.3, and just tested it with the SkyD iOS app (Tx/Rx still not connected to the radio, though). It worked perfectly with power from a USB-C charger, as per the product notice. So I assume a ground wire is not required for powering the IRXON. My understanding is that the data wire will be enough with my Trig, but cannot confirm this until actually testing - hopefully next month. Hope this helps !
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By Tim Dawson - 5/8/2024 10:38:34 AM
Ok, we have started work on getting NMEA autopilot sentences out of SkyDemon, and we would like to explore the Bluetooth option.
vikino, are you still willing to test this? What's your current recommendation for a Bluetooth-to-RS232 device? We will need to purchase one/some for testing in our office, and figure out a good way of testing that the data really is getting to the RS232 feed from the device.
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By vikino - 5/8/2024 11:53:31 AM
+xOk, we have started work on getting NMEA autopilot sentences out of SkyDemon, and we would like to explore the Bluetooth option.
vikino, are you still willing to test this? What's your current recommendation for a Bluetooth-to-RS232 device? We will need to purchase one/some for testing in our office, and figure out a good way of testing that the data really is getting to the RS232 feed from the device. Hello, off course i want to, also with AP if it is possible to send COM freq to radio by clicking of freq in SD. Best what i hafe found, tested and best for this usage is IRXON BT578 v3, it can do BT Com (SPP profile) and also BLE, so it works with Apple and Android
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By Tim Dawson - 5/8/2024 1:26:00 PM
Is either of these the correct item?
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By vikino - 5/8/2024 1:44:14 PM
+xIs either of these the correct item?
The first one
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By Tim Dawson - 5/8/2024 2:25:43 PM
Ok, I've ordered one, it should turn up in the next two weeks.
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By vikino - 5/8/2024 3:51:06 PM
+xOk, I've ordered one, it should turn up in the next two weeks. Let me know when you have app prepared for testing, at best for Android, apk or whatever i can install. I already made RS232 connector in my plane, so im ready plug and play, or plug and fly 
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By Tim Dawson - 5/9/2024 8:58:04 AM
It's likely to be an iOS development first, but I'll post here when we have something working.
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By vikino - 5/9/2024 8:26:38 PM
+xIt's likely to be an iOS development first, but I'll post here when we have something working. Okay, i have also some apple device, so no problem with testing on apple first...
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By gs-avionik.de - 5/10/2024 10:25:26 AM
If it helps I can also offer tests with a KRT2 radio which is available via an BLE-compatible device (esp32 based).
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By vikino - 5/11/2024 11:50:57 AM
+xIf it helps I can also offer tests with a KRT2 radio which is available via an BLE-compatible device (esp32 based). I have hard wired TRIG TY96, TY91, some Garmin radios, its no problem to test them all  Afterwards we can try to connect Garrecht TRX-1500 air traffic over the same Bluetooth, because its also working in my plane over the same RS232 like autopilot, and its already supported in SD, only newer version AT-1, but sentences are the same.
Those features will be HUGE improvement in SD for all pilots
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By moefly - 2/10/2025 10:10:15 AM
+x+xAll,
I was very excited when I read about the feature in the Skydemon release note, went right into ordering parts and figured I share the experience here.
Top 1 priority for me was to get the radio (f.u.n.k.e. ATR833-II) connected. So I designed a 3d case that perfectly fits on top of the original Sub-D connector housing and uses the existing screw holes (only needed slightly longer screws). Once mounted, it sits below the connector at the back of the radio and doesn't block anything else / basically uses the same space.
I decided to use a HM-18 BLE to serial module. It is very power efficient and therefore I could easily use the 5V the radio provides on the Sub-D connector. The HM-18 is outputting TTL serial, hence I added a MAX3232 converter to provide the proper RS232 levels the radio expects.
Put everything together and it worked right away. For me it's almost a killer feature in Skydemon as it makes my life so much more simple during flight. A big thx to Tim and his team for adding this feature!
Hi moefly,
according to HM-18 datasheet the power supply voltage is from 1.9V to 3.7V. The ATR833 has 5V output. Do you use a voltage converter or do you just run out of specs?
Regards, Tobi
Hi Tobi,
sorry for the super late reply, didn't see it until now. Think it was already answered in the meantime: The HM-18 module itself is spec'd to work between 3.6-6V, so should be fine with the ATR833 5V output. The serial levels need to be shifted though as the HM-18 uses 3.3V but the ATR833 expects proper RS232 levels, which is why I added a MAX3232 in between. Best Markus
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By Bealeyman - 2/12/2025 5:07:57 PM
I have a GNS 430w and would like the bluetooth feature and some help! Please.
Saw your post Michael, thanks for posting
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By john123 - 2/17/2025 2:18:53 PM
Hi, Does anyone have any information of how to upload frequencies to the Icom A220TSO? It does have a TXD and RXD pins on its 25way D and it also mentions that it can get frequency data from Garmin GPS units. I have spoken to Icom support but they don't know anything useful. On the older Icom units there was a stereo 2.5mm jack that had the serial lines but apparently the 2.5mm jack on the A220TSO is for Aux Audio??? Anyone can help?
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