I have a Pixhawk 2.1 with a here GPS.
My problem is that I cannot change the flightmode to AltHold or Loiter when the Copter is armed.
When it’s disarmed it works fine. Taking off in Stabilize works, but i cannot switch to another flight mode.
I always get the failure message “Unable to change flight mode” in Mission Planner.
128 01.01.1980 01-00-00.bin (256 KB)
In the log it says
EV_FLIGHT_MODE-2 (When i switch to ALTHold for instance)
all at the same time.
Googling the error codes did not help me out.
Does anyone know how to work with this issue?