No IMU detected

[volksbar]

Hello,

I use IMU MPU 9250 and successfully calibrated it before. But it is not detected any more. The only thing changed/happened in between is reinstalling signalk (accidentally...). It remains in the same mounting place and hasn't been touched.

   

I also tried:

Code:

pi@openplotter:~ $ sudo i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

I measured the voltage on the board, 3.2v was transferred to the sensor.

Any ideas or suggestions to test if the IMU sensor is defect or to debug this are highly appreciated. Many thanks!

[seandepagnier]

If you are sure the connections are good, the best way is to try a different sensor, and/or pi to see which one is the issue. For example you could have damaged the i2c bus on the pi, and the sensor is fine.

Also if you can try a fresh sd card to rule out software.

[gaffthirty]

I have tested with a new sensor, and it's working.

[volksbar]

If you are sure the connections are good, the best way is to try a different sensor, and/or pi to see which one is the issue.  For example you could have damaged the i2c bus on the pi, and the sensor is fine.

Also if you can try a fresh sd card to rule out software.

Thanks for the hints, @Sean. I just tested the new sensor but it is still not detected. I also tried a fresh sd card and got the same error. Next I will try to find another pi to test if the i2c bus is damaged. Will report back later. Many thanks!