MPU9250 heading is slowly drifting

[It Paradyske]

I have been able to reproduce your issue. Please follow this to calibrate: http://pypilot.org/wiki/doku.php?id=calibration

I tried the callibration procedure over and over again, but it does not trigger anything, so.etimes I see a new pypilot.conf being written, but it is still 0 0 0 1

I tried copying in the calibration values for compass in the pypilot.conf file, but the values for compass also remain 0 0 0 30 .
Although the values in the conf are different. They remain different after the conf is written.
I see no 30 anywhere in the conf. So I have the impression that the conf is not read.