3DR DIY Quad 2014
Pixhawk
APM 3.2
I have occasionally seen these and usually unplugging and plugging in the battery usuall fixes things. However, today it would not clear and I could not get off the ground. I had done a short test flight earlier without issues in a different location. The compass direction in the telemetry seemed steady, but was indicating a different direction each time I rebooted.
I recalibrated the compass very carefully without issue (selected Pixhawk in APMPlanner2). Calibration found two compasses - internal and external I assume - and the IDs were as documented in github.com/diydrones/ardupilot/issues/1355 - i.e. both had ID’s, compass 2 was NOT -1. Is this correct? The compass heading in APM is correct and responds quickly to movement. Applied power and same result “Compass not healthy”. Tried again and got “Compasses inconsistent”.
So here’s a weird thing. I connect the battery with the copter not moving (obviously). If I then rotate the copter a little so that the heading viewed in APMPlanner2 moves the error goes away! If a compass is faulty, how can I tell which one. How can I tell whether the calibration is reasonable?
Thanks for any help