Hi Ixck,
Usually, when the calibration state reaches 3, the algorithm outputs the most reliable value. Saving the calibration profile at this time is a recommended practice.
Can we know what product you are using BNO055 on?
From your previous logs, it appears that the heading value changed before 109 to 111 and did not shift to 140. Can you provide more logs and attach the CALIB-STAT value printed on each line?
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