When I try to connect to the matek 405 wing using either Bluetooth or 433mhz radios I have the same problem.
If GPS is connected Mission Planner fails to connect and times out. If I disconnect the the GPS (a BN-880) first, it works every time.
Subsquent to a successful Mission Plannerconnect, if I attach the GPS to the Matek 405 wingwith the power still on, it works. If I disconnect the Mission Planner (with the power still connected to the Matek 405 wing) using the Mission Planner disconnect button and then re-connect it still works.
The same story if I just disconnect the GPS Tx to the Matek board RX and then connect it after telemetry is working, all works.
I’m using TX1/RX1 for the telemetry, TX3/RX3 for the GPS
anybody got any ideas why?