@dda Thanks, I had tried 34 in the other Library and it wouldn’t work. But when I inserted the writeByte lines just as you showed, it worked. But i’m still having issues running my IMU via interrupt vs just times (like a fixed 1KHz). The timed approach always works, but the interrupt approach will crash sometimes or lock up. So something still seems off with the m5stack and the MPU9250. Also the magnetometer doesn’t seem to function properly on the m5stack for me, even after the battery pack with magnets is removed.

@BlueWhite Really sorry about that !! After downloading this iic example for detecting iic address, if the screen shows 0x75, it means the IP5306 chip is IIC version. Otherwise, the IP5306 on your core is not IIC version.

I have had this randomly pop up on all mine now. Not sure what the issue is but I've just ignored it.

Hey @kabron I have never met this phenomenon yet

Hi @frangimeno2000 not quite sure what you mean. Do you want the M5stack device to turn on when USB is connected or to put it into deep sleep and wake it up again when some condition is met, such as shaking the device or pressing one of the A, B or C buttons?