Hallo. We are using the BNO055 for our research project. It worked well before. Currently, we meet a problem with the calibration. When we already calibrate gyro, accelerometer and magnetometer (all status are 3), the system calibration status is quite unstable. It just changes randomly from 0 t0 3. And when it is static, it may show 3 stably. However, when we move it, the calibration status may drop to 0 and come back to 3 again. But in the meantime, the calibration of other 3 sensors do not change (all 3). Besides, we also visualize the rotation of IMU. We observed that sometimes when the system calibration status of IMU drops from 3 to 0, the output rotation is still the absolute orientation w.r.t. global coordinate frame.
Could you tell me where this problem may come from? Is it because that IMU do not find north pole (but magnetometer shows that it is fully calibrated)?
