I am running firmware 3.4.6 on a PX4 with a Ublox M8N GPS/Compass. Until recently, the PX4 and Ublox compasses were both working correctly. I then had problems with the quad not taking off, but flipping over. I tried recalibrating everything, but could not get the Ublox compass to calibrate successfully in MP Live Calibration.
I then re-installed the firmware and tried again many times, to no avail. Although the PX4 compass calibrates, MP Flight Data now constantly displays Unhealthy Compass.
I tried deselecting the external compass to calibrate the PX4 compass only, this works, however, I still get the Unhealthy compass message, even after several attempts to overcome this.
Is there any way that I can test the compasses to if there are faults?
Some help would be greatly appreciated.