Abit of a delayed reply, but with the APM2.8 you need to connecth the jumper on the MAG pins to use the built in compass.
Otherwise if using an external compass you need to remove the jumper.
Hope that helps
Abit of a delayed reply, but with the APM2.8 you need to connecth the jumper on the MAG pins to use the built in compass.
Otherwise if using an external compass you need to remove the jumper.
Hope that helps