Chris Drane

Unfortunately no.

Thank you for your prompt reply. My very limited understanding is that when you do `mx = (float)magCount[0]*mRes*magCalibration[0] - magBias[0]` you are a adjusting the count with the fuse value...

I agree. Assuming you can do an accurate soft iron calibration, then the fuse values can be ignored, because the soft iron calibration will measure the combined effect of both....

I will keep in mind your sketch for two MPU9250s. Is there a decent open source library for the ICM20948? Your approach to calibration appears to be novel, and so...

I have done a first cut of my mathematical analysis, which currently indicates the fuse values are useful even if calibrating. My first cut is often wrong, but I hope...

I have written a [technical note](https://www.philomaths.org/papers/calibration) that describes a mathematical analysis of the calibration algorithm. The paper has not been refereed so comments are especially welcome. The paper considers the...

The [technical note](https://www.philomaths.org/papers/calibration) also describes a simplistic error analysis of the calibration algorithm. It finds that if a Figure 8 maneuver is used for the calibration, it will at best...

Here is the [technical note](https://github.com/kriswiner/MPU9250/files/6302044/calibration.pdf).

I believe you when you state there is no fool proof recipe. I thought your algorithm interesting, so my major motivations were understanding it better and to understand the fuse...

The paper looks useful, but just states that the soft iron causes a linear/affine transformation, except in the case where there is hysteresis. I am after an earlier paper or...