Problems with PixHawk and V4.3.7

Wow, the last time I was here must be like years. I have several (5 or so) Pixhawks from back then and I am trying to get one of them set up on a small EAchine racer. I’m using the latest Mission Planner and I think I see an error that refers to the I Meg limit.

I can’t do an ESC calibration. When I press the switch I don’t get the red light and it doesn’t go into calib mode. Given that, I can’t Arm the unit…

What would be the latest firmware that is compatible to the Pixhawk1

Given you’re using MissionPlanner it sounds like you’re using ArduPilot. I’d ask in

OK thanks… V3.3 was the latest rev when I was there!