@Todd_Bagley : yes, put together cable. I’ll double check. We have a jumper between #4 and #6. Not a BEC for #2 and #4. That same wiring works with Pixhawk1 though (different cables though).
@hunt0r : ArduPlane? ArduPlane? which version? Could you provide your param file or the SERIAL1_* , SR1_* , and SER1_* parameters you use please? Thanks
@Alexander_Perez : Pixhawk2.1? Param file?