I have a telemetry radio connected to TELEM1 and a Raspberry Pi listening to MAVLink messages (using the dronekit library) from the Cube on TELEM2. For some reason, both don’t work at the same time: if Mission Planner is connected via TELEM1, the Pi generates errors when it tries to connect to TELEM2.
The specific error message (repeated indefinitely) is:
Exception in message handler for HEARTBEAT
mode 0 not available on mavlink definition
Are there parameters that can be changed to allow both to work at the same time?