Navio+ startup servo output

Navio / Edge Hardware
3

Arduplane, currently on the 3.5 release. Everything is calibrated (it flies great once it is up and running).

Here a rundown of how the boot sequence goes:

  1. Apply power to Navio and RPi with power module, servo rail and receiver are powered separately (regulators on this Navio have been removed as per this post.
  2. Instantly, LED on Navio turns white, all servos move to and hold at an extreme position.
  3. ~15 seconds later, channels 1-4 become controllable, all others stay at extreme positions.
  4. ~15 after that, elevator wiggles a bit, all channels become controllable.

I’m not in the lab at the moment, so that account might not be 100% accurate. I can take a video and get some oscilloscope readings later today once I get in if you like.