FXOS8700 compass heading accuracy

keithmok — Tue, 03 Feb 2026 21:02:16 GMT

If the FXOS8700 is installed at fixed location. i.e. we cannot rotate/tilt the device to let the e-compass to do auto calibration. What is the expectation on the accuracy on the compass heading ?

Re: FXOS8700 compass heading accuracy

TomasVaverka — Wed, 06 Jan 2021 09:09:18 GMT

Hi Keith,

It is hard to estimate an accuracy in such a case.

The magnetometer requires calibrating not only for its own offset, but also against spurious magnetic fields resulting from any nearby ferromagnetic components on the circuit board.

App notes discussing this topic in detail:

Calibrating an eCompass in the Presence of Hard- and Soft-Iron Interference

Accuracy of Angle Estimation in eCompass and 3D Pointer Applications

Best regards,

Tomas

SensorsのトピックRe: FXOS8700 compass heading accuracy

FXOS8700 compass heading accuracy

Re: FXOS8700 compass heading accuracy