Quaternion values are not stable

[ebadier]

Hi pruthvikar,
I have started to use the new firmware and uploaded it to the sensortag and it works. Nevertheless, the value I obtain with Xcode (iOS) are not stable : quaternion values don’t stop to change, even when the sensortag is not moving.
Have you got an idea?

Thanks

[pruthvikar]

Hey Emmanuel,

I had unstable values as well when I tested it. I didn't investigate any further but I would recommend changing the update frequency and parameters of the algorithm.

Pruth

[pruthvikar]

Hey Emmanuel,

The instability is to do with the lack of calibration of the sensors. If you would like to include the calibration code and submit a pull request, that would be great!

Pruth