Hello all,
I am building a drone for my work and have this prearm error
PreArm: Check mag field (xy diff:139>100)
PreArm: Check mag field: 184, max 875, min 185
I read that I should recalibrate the compass so that is what I did. Error went away.
So I arm the drone and take off. Drone is in stabilize mode, has 3D GPS Fix and is hovering nicely with a bit of drift. I start a very simple mission to fly to a single way point then RTL.
As the drone starts to fly to the waypoint I see this message
EKF Failsafe: changed to LAND Mode
EKF variance
The drone loses control and crashes. 
2 of the props are damaged, so nothing that can’t be fixed. However, when powering the drone on again the same mag field errors come back.
I read that the GPS needs to be mounted away from metal, wires, etc. Which I believe it is. See picture below. This is a Holybro M10 GPS module, mounted away from other components
Does anyone know how to fix this? I really need this drone working in a GPS guided mode so it can fly waypoints on its own.
Thank you in advance
2 posts - 2 participants