I’m getting really frustrated because I can’t calibrate anything with APM Planner.
I have connected it via tcp,udp,radio, it keeps shutting down and giving me the same message about either the compass or the compass. I have run the Navio example, it works perfectly. Also re installed APM binaries. Any help would be much appreciated, my deadline for the master project is next week 
Is it saying that the compass isn’t calibrated? That type of warning? If so you, you can go into the parameters list and turn off the pre-arm checks.
Yeah it says “PANIC: failed to take spisem 100 times in a row, in AP_Compass_AK8963::_update” .
I’ll check that thanks !
Oh, I don’t think that is the error I was thinking of… sorry.
Do you get lots of “???” and “///” etc when connecting to APM from the sudo command ?
I’m not sure if I understand what you mean by connecting to APM from the sudo command.
As in : sudo ArduPlane -A …
Are you using standard raspbian or the emlid RT image?
emlid RT