about step counting, if you want to take a lower level approach and embed it into the firmware, this is open source and validated: https://github.com/Oxford-step-counter/C-Step-Counter
There are some constants that need to be optimised because they depend on the actual hardware you use and the sampling frequency (we used 50Hz, but probably 10Hz would do anyway). See the instructions in the README. If anyone here wants to try including this in the BangleJS firmware, I'll be happy to help.
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