Hi,
About the aircraft orientation indicator ; needs 2 signals.
- arrow direction is getting its info from the drone compass
- postion of the arrow on the 180 degrees scale gets its info from the mobile device compass
I had to turn my device 180 degrees different in the RC clamps than before, this while ago after updating the app and firmware.
So no need to calibrate the drone compass as long as the arrow is pointing to the correct heading, if the position on the scale is not correct ; calibrate device compass.
PS even with a wrong compass device (as long as the arrow is in the forward part) ; when direction the arrow towards the center drone is always flying to the HP.
cheers
JJB