Compass calibration impossible


I have severals problems with my compass calibration:

  • I’m using an Erle-Brain 2 (hexa frame)
  • APM version: APM:Copter V3.4-dev (c102da5)
  • GCS: APM Planner v2.0.24 and Mission Planner 1.3.56 build

1- I can’t upgrade my device with the proposed firmware (V3.5.5) because my Autopilot isn’t be identified

2- I can’t make a good compass calibration and I don’t understand why. I’ve tried with APM Planner and Mission Planner and there were the same issues: I still have an “error compass variance” even if I disable the compass2, values are too different.

Is anyone have a solution?


Best Regards


Short answer:
You’re trying to load a firmware in an obsolete hardware.
For few more $ you could get a recent pixhawk clone… :slight_smile:


Hi Henri,

and thanks for the short answer :slight_smile:

You are telling me that I should buy a new Erle-Brain version to get a new Pixhawk device?

Is the same reason why I can’t use correctly the compass?



The old and obsolete APM did use a different wiring than the Pixhawk. They are both I2c and serial for the compass and gps but the wiring is a bit different.
I failed to find a single reason to use an APM today (OCT 2018) :slight_smile: