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FXOS8700 Magnetometer

Question asked by Michael Chapman on Nov 20, 2017
Latest reply on Nov 23, 2017 by Michael Chapman

Hi, I'm using the NXP FXOS8700 and a FXAS21002C on a Adafruit breakout board that uses I2C comms. Each device can be configured and the status read using single and multi-byte transfers as shown in the attached document. However the magnetometer gives an output that seems odd that is to say it doesn't make sense to me.

I have tried degaussing the sensors too try and get rid of any residual magnetic field. One of my boards has a massive offset.

 

I was expecting the magnetic sensor to give and out similar to the accelerometer, i.e. the output when pointing:

  1. towards magnetic north would be +ve
  2. in the opposite direct (point south) would be -ve and approximately 60uT

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