Many EKF and other erros

During test flight and even on the ground I got many different errors but quad flies ok (almost)

  • I am not able to arm quad in loiter mode, in alt hold mode it arms and flies.
  • When switching flight modes on the ground with remote controller I got error (in Tower app): Flight mode switch failed
  • During flight I got some EKF errors on screen in Tower app
  • Differenece in voltage on ground and in the air is 1V! (auto review log reports: Test: VCC = WARN - VCC min/max diff 0.356104v, should be <0.3v

Including the log files, I cannot read whats wrong… Please help.

Maybe I have some answers:

  1. loiter cannot be armed until certain amount of satelites are acquired… (for some reson it takes a while to get 8 sat on my ublox)
  2. It might be related to the same problem of satelites, modes cannot be switched until enought satelites are acquired?
  3. I also tried on fully charged battery and there is also 1V difference in flight/land