Recurrent problem reading MPU9250 registers value

By achalons , 29 August 2018

Hello,

I am programming a microcontroller in order to use an MPU9250 to analyze the motion of an object.
My code and the design of the electronic board seem to be correct as I have been able to read the values of the accelerometer, gyroscope and magnetometer successfully.

However, frequently (not systematically) when I power on my electronic board and start the initialization routine of the MPU9250, I don't get any response from it (I can't read any value from any of the register) even though nothing have changed neither in my code nor in my wirings nor in the operationg conditions. I have several identical boards, presenting this recurrent problem.

I am posting my problem on this forum as I have not been able to identify its origin. I would be very grateful for any help to solve this problem.
I am using the MPU9250 Arduino library to communicate with it and I can provide the schematic of the electronic board and my code if necessary.

Thank you.

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