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FRDM-STBC-AGM01 Supposed Calibration Issue

Question asked by Adam Savage on Jan 9, 2020
Latest reply on Jan 13, 2020 by Anthony Duhamel

I am currently testing a FRDM-STBC-AGM01 with FRDM-K22F using NXP sensor fusion toolbox for windows.

I have taken the boards outside, calibrated the sensors and tested against a 360 degree baseboard.

Here are my error results below:

I understand that it is very difficult to get very accurate heading readings even with gyro compensation/calibration etc but it seems these errors are too high compared to other DMCs I have tested.

 

I have noticed results like these 'sine waves' before and it transpired that the compass was not calibrating properly.

Has anyone experienced something like this before with the NXP chip? if so how did you get the calibration to stick?

 

Thanks in advance, Adam.

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