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Hello all!

I'm trying to use the following combination:

DJI F450 Quad,

ArduCopter APM 2.8, external GPS - UBLOX 7m

FlySky i6 (Tx), FlySky FS RXB (receiver)

I performed all the calibration, verified the compass values, MOT.

I'm unable to arm the quad. Neither mission planner, nor direct radio would arm the quad.

I tried disabling all the safety checks, still nothing works.

Initially, I had a "bad compass health", I was able to resolve it by re-positioning some of the components, and performing the calibration again.

Then the "check mag field" error showed up, I was able to resolve it too.

Now I'm kind of stuck with "High GPS HDOP" error.

I tried changing the value of the GPS_HDOP_GOOD parameter, nothing changed.

This is happening both indoor and outdoor. 

Can somebody please help me resolve this?

Thank you,