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bolderflight / invensense-imu

Arduino and CMake library for communicating with the InvenSense MPU-6500, MPU-9250 and MPU-9255 nine-axis IMUs.
MIT License
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WHOAMI byte #51

Closed Colidar closed 5 years ago

Colidar commented 5 years ago

Hi all,

i am using MPU9250 with an arduino nano and arduino IDE 1.8.9. When I'm trying to use the BASIC_I2C sketch there is an error with status -5...

IMU initialization unsuccessful Check IMU wiring or try cycling power Status: -5

I have checked the error in the MPU9250.cpp: // check the WHO AM I byte, expected value is 0x71 (decimal 113) or 0x73 (decimal 115) if((whoAmI() != 113)&&(whoAmI() != 115)){ return -5; }

But i don't know how to deal with this error and to run the sketch properly.. I'm happy about your advice!

flybrianfly commented 5 years ago

Sounds like it isn't actually an MPU-9250 IMU. You can add the following right before the return statement and we can look up the sensor you're using:

Serial.println(whoAmI());

Colidar commented 5 years ago

thanks for your answer! I'm pretty sure that it's a MPU-9250 IMU.. image

My WHO AM I value is 112 (0x70 in hex).. So i changed it in the MPU9250.cpp file but then i got the error -14. Once again i print my value and it 0 instead of expected 72..

Any new advice?

flybrianfly commented 5 years ago

The WHO_AM_I value indicates that you have an MPU-6500. This is only a 6 axis IMU and does not have the magnetometers, which is why it then starts failing at the magnetometer initialization. You could modify the library to remove all of the magnetometer calls and it should mostly work.

Colidar commented 5 years ago

nice to know :D thanks a lot, it has to be a failure in delivery