Hi @steinoxyd , I had the same issue which I got help with on the m5stack github before seeing this. I may as well direct you straight to it than repeating it fully here; https://github.com/m5stack/M5Stack/issues/194 The issue is the 'IMU.calibrateMPU9250(IMU.gyroBias, IMU.accelBias);' which if commented out, the code will run. From the comment from @lukasmaximus I have not realised the probable reason for the issue.