Thanks for your time, I am converting a robot mower with a pixhawk controller. I can't send a signal when I use 2 cards at the same time. one individually works, two become "deaf". the wiring looks correct, do you have ideas? on pixhawk is loaded ardurover 3.5.1 and is set as a robot with 2 engines to turn and advance.
ideas on what i can try? one thing, trying with a servo test I can't control the MD20a card, how come?