I am new to px4. I was developing a drone with raspberry pi and navio2 using px4 and QGroundControl. I have already made communications between px4 and qgroundcontrol using UDP(wifi communication) and telemetry devices etc.
Now i want to communicate between px4 and qgroundcontrol using a GSM Module(eg: SIM900, SIM800 etc). For that how to begin with? Please help me with that.
Thanks in Advance for the Answers