LSM6DSO sensor + Arduino

[gndLD]

Hello! 

First I would like to state my issue: 

1. My software cannot connect to the LSM6DSO IMU sensor.

A little background on my project is that I am trying to use the IMU sensor to provide accelerometer readings in x, y, and z directions. I purchased a breakout board from Sparkfun that uses the LSM6DSO to test the sensor first with my Arduino-compatible controller via SPI communication. This proved that it works. 

We then created our own design and referenced the way Sparkfun wired the LSM6DSO. Now when I run the program on the new board, the sensor doesn't work. 

I looked into the library that Sparkfun uses for programming in Arduino and I see that it cannot connect to the IMU sensor. In the library I can see where it fails and it fails when checking the part ID. I keep getting a part ID of 255 which is 0xFF. I should be getting a part ID of 108 or 0x6C.

Any ideas on what I can do to make it work?

uint8_t partID;
readRegister(&partID, WHO_AM_I_REG);
if( partID != 0x6C ){
    Serial.println(partID);
    return IMU_HW_ERROR;
}
else{
    Serial.println(partID);
    return IMU_SUCCESS;
}

[gndLD]

I had a Bluetooth module that snapped into our PCB and thought it was a good idea to snap it off and only debug the IMU sensor. After I snapped it off, I am now getting a part ID of 0. Also the MISO line before didn't have a signal, now it does but still wrong part ID read. Therefore, I still get nothing for the accelerometer reading of the sensor.

[gndLD · Accepted solution]

Solved. The wrong pin was assigned to MISO in the SPI config file. For me in Arduino that was in the pins_arduino.h file.