Does the HUD in Mission Planner indicate True or Magnetic North, given that it knows the declination??
I have two vehicles running latest APM software; a ROVER and a PLANE.
Both have a Pixhawk and a combination external compass and a GPS.
On both, the GPS appears to work great.
On the ROVER, the external compass appears to work fine pointing N, E, S & W as expected when I rotated by hand in my driveway.
But the PLANE’s external compass is truly scary. It points fine to the North and South but way off when pointing East or West.
I am suspecting Orientation issues.
On the ROVER, the Pixhawk and the Compass/GPS both point directly forward.
( I have orientation in the ROVER set to 0 for the internal, compass, external compass and AHRS).
But on the PLANE, the Pixhawk and Compass/GPS both point directly aft.
On the PLANE, I have tried several Orientation combinations and failed to find one that works. The Orientation descriptions are a bit vague when referencing the vehicle or compass or AHRS.
Can someone please solve this issue.
I have flown the PLANE three times, ( on Manual only ) and it seems to fly ok.
I do not want to try anything else until this is settled.
BTW, compass “live” calibration works fine on the ROVER but fails with only 3 dots on the PLANE.