External Compass Questions

[george.staroselskiy]

Hello Evgeny,

Sorry it took us so long to reply.

@agamirzov

So the question is why? Shouldn’t the external compass be COMPASS 1? I blindly believed it was true… and it cost me many hours of pain.

This is an implementation detail that shouldn’t really be depended on. AFAIR, external compasses have been set as COMPASS 3 for quite some time.

@agamirzov

So I changed the orientation to YAW_90. With these settings there is no more “Inconsistent Compasses” error and “Loiter” mode is stable, which wasn’t the case with other settings. What could be the reason? Is this particular HMC5883L faulty?

I don’t think it’s faulty. The values that are getting read look OK. Have you recalibrated the compass after changing orientation? It’s an essential step (we’ll update the docs). After everything’s calibrated, all three compasses should report very similar readings in logs.