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compass calibration discussion

Question asked by chunfeng ren on Jun 30, 2016

now we are using  a NXP(freescale) solution to make a project, in this project we need to make use of compass function in this imx6 chip. could you tell me if  compass is needed to be calibrated before the chip leave factory? if we need to calibrate the compass, how to calibrate it? could we calibrate it over internet? thanks a  lot