Hello everybody - this is my first Post as I am new to SkyDemon.

I have a Tablet-PC (Panasonic Toughpad FZ-G1) with Windows 8 installed. This Tablet had a internal dedicated GPS-Receiver installed which worked with the Trial-Version of Skydemon well for the 30 Test-Minutes. As it was a dedicated GPS-Reeceiver that means, my Tablet had no WWAN-capability. So I got it upgraded by Panasonic with a SIERRA WWAN-Card with GPS-capability on board and got the dedicated GPS-Receiver superseded by a USB-Connector. Unfortunately I did not pay attention to the Protocol the dedicated GPS-Receiver delivered.

The SIERRA WWAN-card works fine with the Panasonic GPS-Viewer-Application and gets a Fix immediately. The GPS-Receiver is set to COM 7 at 4800 Baud. It deliveres Protocolls with $GP, $GL and $GN. If I now connect SkyDemon to COM 7 at 4800 Baud it will not get any Fix. But it does not complain that it could not find a Receiver! If I connect SkyDemon to any other COM-Port, it complains that it cannot get a GPS-Signal. So obviously Skydemon detects the Receiver on COM 7 but can not use the Signal itself.

I then tried a old external Holux GPSLIM 236-Bluetooth-Receiver. This connects via BT to COM 40 at 38400 Baud and is recognized by Panasonics GPS-Viewer-Application as well as Skydemon and both get a FIX with the Receiver. If I have a look at the transmitted Protocol in the GPS-Viewer-Application, I can see only $GP-Messages!

I found a Thread in this Forum from 2013 where an issue was discussed concerning GLONASS-Messages and from what I understand, the $GL-Messages from my internal WWAN-Card are from GLONASS?! According to the Manufacturer, the SIERRA-Card is GLONASS-capable.

So my Question is
- if there is still an Issue with Skydemon and GLONASS-Messages or if I am wrong with my conclusion and
- if there is an Issue with $GL an $GN-Messages, is there a possibilty to filter them out?

Unfortunately I can´t find a solution to tell the WWAN-Card to only deliver $GP-Signals (which might be the easiest way).

Hope I could make myself clear in a few words.
Best regards and thanks to anybody for reading (and helping)

Bernhard

SkyDemon simply ignores any messages which are not the standard GPS fix messages.

Certainly every mainstream GPS receiver should emit the bare minimum sentences necessary for SkyDemon to gather a fix, yes.

+x

 

Tim Dawson - 8/30/2018 4:25:18 PM

Certainly every mainstream GPS receiver should emit the bare minimum sentences necessary for SkyDemon to gather a fix, yes.

Thank you for that info. So I will dig a little bit deeper to solve my issues.