Hello Gideon,
1. Please check page 102 in BMI270 datasheet. So, if the value is 1024, that means you need to wrist your device at least 60 degree.
2048 * cosine (60) (1/2) = 1024. Like this.
Regarding focus, non-focus position, we defined as below.
2. Yes, I tested with default value.
3. Yes, please check below url.
https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi270-ds000.pdf
Thanks,
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