Hi kgoveas, thanks for your reply. Yes, the error in the other ticket is because of setting offsets. That is not the reason for my problem. Only the same error code, wihch i want to show you. Before the first read time of reading "BNO055 SYS_ERROR 0x3A", I do the following thing once as init: 1. Set configuration mode (OPERATION_MODE_CONFIG 0x00) 2. Set unit selection 3. Set power mode --> Normal 4. Set operation mode --> NDOF After that, I will read the the information of chip circularly. This error trigged only stochasticly. It is a pity, there is no certein time between "boot with no error" and "error comes".
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