If you want to fly in autonomous modes. You have to check the compass. We recommend to use an external compass.
Note: We call external compass: GPS uBlox Neo-M8N and digital compass.
Before flying please check that the compass is pointed to the correct cardinal point. For example, Use your smartphone to compare the compass of your phone with the compass in Erle-Brain. It's possible that you have to calibrate both compass (smartphone and Erle-Brain).
Erle Robotics is not responsible of the bad use of the compasses
Erle Robotics is not responsible of compasses not provided by us