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Autopilot + COM freq. over BT to RS232


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Michael Hoffmann
Michael Hoffmann
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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?

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

Michael Hoffmann
Michael Hoffmann
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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

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

Clive
Clive
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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

Or even a Funke 833

Clive
Clive
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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

john123
john123
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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?
Bealeyman
Bealeyman
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I have a GNS 430w and would like the bluetooth feature and some help! Please.

Saw your post Michael, thanks for posting

Edited 2/12/2025 7:53:51 PM by Bealeyman
moefly
m
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tobi - 10/11/2024 5:18:54 AM
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!

In case anyone is interested in the 3d model and a more detailed info on connection and parts I used, you can find all of that here on printables:
https://www.printables.com/model/1015550-funke-atr833-ble-rs232-case

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

Bouwair
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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

Edited 2/5/2025 1:02:20 AM by Bouwair
Michael Hoffmann
Michael Hoffmann
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Michael Hoffmann - 1/31/2025 9:15:13 PM
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?

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

Michael Hoffmann
Michael Hoffmann
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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?

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.

GO

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