Hi ljschreiber,
BNO055 is a consumer grade sensor. BNO055 integrates fusion algorithms, which can output Euler angles (pitch, roll, heading) in both IMU and NDOF modes. If obtaining higher precision heading values, NDOF mode is usually used. The further away BNO055 is from the heat source or high current, the better, usually placed 5mm away from the interference source.
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