Magnetometer calibration

[gauteh]

• https://myahrs.wordpress.com/2012/04/20/script-for-magnetometer-calibration/
• https://thecavepearlproject.org/2015/05/22/calibrating-any-compass-or-accelerometer-for-arduino/

[jerabaul29]

:) . I never had the time to implement this, but had looked at this quite a bit in the past, "in theory" there is no real difficulty and all is readily available, but unsure how much work it will be to get all working well.

[gauteh]

This magnetometer comes with factory calibration: https://www.st.com/en/mems-and-sensors/iis2mdc.html#documentation, I don't know if additional calibration is necessary. But if not, it might be a good alternative.

[jerabaul29]

Mmmh, the thing is I think we would still need to compensate for many additional effects in addition to the sensor characteristics itself: effect of the metal on the breakout, the surrounding wires and currents, the batteries etc. I think this means that we will need to do a calibration 'in situ' inside the instrument with everything on, as described in the cave project.