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IMU not detected buy pypilot
#1
Hello Evryone,

I'm a new user of openplotter. (I have just a few weeks of experience and I find it very impressive)

I have a rasp Pi 4, with Mac Arthur HAT and IMU ICM 20948 and powermodule.

I could install every thing and it worked fine (unless I couldn't find the way to save the log files but unfortunatly it will be for another thread  )

Today I face that the IMU is not detected by pypilot anymore. 

As I have everything in spare so I did some trials :
- change the IMU-> doesn't work
- change the HAT with fisrt IMU -> has worked
- 1rst HAT with 2nd IMU and a 2nd Rasp -> doesn't work

as if the trouble was with the HAT or between HAT and Rasp.

But very quickly I faced the same issu with the 2nd HAT.

I tried with a new fresh image of openplotter on SDcard, just installed the pypilot but the IMU is still not detected.

of course I2C is on in rasp-config.

Do anyone as an idea of what I could have done wrong ??

Thanks !48 Heart CM-2094IICM-20948
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#2
Do you still see the IMU's address (0x68) in the "Add I2C sensor" dialog in the OpenPlotter I2C app?
   

If not, you can try a fresh official Raspberry Pi image (no OpenPlotter) and follow this tutorial:
https://learn.adafruit.com/scanning-i2c-...spberry-pi

If you do see the IMU in any of these, then your issue is with the software configuration (Pi, OpenPlotter, Pypilot...).

If you don't see the IMU's address, then there's an electrical issue. Either the IMU is not properly connected, or the IMU is defective, or least likely, the Raspberry Pi's is defective.
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#3
First : thank you very much for the time you took to answer me.

I've tried through the I2C openplotter app, the i2cdetect command, even with a new fresh official raspberry image and the sensor is never detected.



I'll find a new sensor and also material to connect it directly to the rasp without the Mac Arthur HAT to see what happens...

Best regards
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