Hi, I am trying to connect an RPI3 to the PH2.1 running PX4 but no success. Trying to use APSync image but is there a better way. Trying to send back the video from the PiCam and telemetry from the flight controller back to QGC. Thanks.
First make sure you have the tight port, and that it is also no assigned to a console in cmdline.txt. the pixhawk will allow you to set baud rate via parameters, then I use stty to set the RIP baud. Make sure you have permission. You can test with sudo cat /dev/ttyS0 (your port of course). Let me know if you have problems.
Ok - looks like I would be better off starting with a fresh image. Would you still recommend APSync?