I'm experiencing a weird problem related to the GPS module. When the GPS is not plugged in, the copter flies fine, but when I plug in the GPS, the APM becomes unresponsive 10-20 seconds after it boots. I'm running the ArduPiratesNG code.
I have an quad arducopter running the ArduPiratesNG code.
I am having problems with the compass heading. The compass is reporting useless values between 60 and 150 degrees. When flying it does not keep a steady heading and slowly rotates.