Had a plane with an mRo Pixhawk working prior on an earlier Arduplane release. I upgraded to Arduplane 3.8.5 now and set things up the same as before.
But I cannot get the servos to move.
In Mission Planner I see the RC channels in changing as per stick movements on the transmitter. I also see RC channels out changing.
I measured 5.1 volts on the servo rail (separate regulator), and the servos do their usual twitch on power-up. They just do not move after boot-up.
I disabled the safety button feature. I calibrated the compass, the power module is delivering battery voltage, the GPS fix is good, it has a good RC signal.
Am I missing something obvious?