I have tried two different telemetry sets, the latest being 3DR with my MATEK F405-TE without success. I get solid green lights so the air and ground modules are connected. I see COM3 in Device Manager when I plug in the ground module and I set the Baud to 57600. When I load parameters in Mission Planner it shows 57600 baud. When I try to connect using COM3 and 57600 baud it will not connect and times out. I’ve restarted my PC, rebooted the FX. I tried TX4/RX4 and TX1/RX1. Any help will be appreciated.
Use these sources to determine the UART Order for Ardupilot:
Ardupilot Matek F405-TE
Matek Ardupilot mapping
And make sure the Protocol for the Serial port you are using is set to Mavlink2.
And of course Tx>Rx/Rx>Tx