Bangle.js 2 now available to buy

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Gordon
It's hard to explain - just tried putting them side-by-side for a video but if I put them both on my wrist the performance depends on which order they're in.

Here are two screenshots...
- Red is the filtered value (which is then peak detected)
- Purple is the raw HRM value (with DC bias removed)
- Green is the raw value from the HRM
The one on the right is the new VC31B. The actual signal varies less with heart rate, but it's much 'cleaner' - I believe the sensor itself probably has a higher dynamic range.

I run the new one at 25Hz rather than the old one's 50Hz as well, which helps with power consumption. Even at half the rate it seems to perform slightly better

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myownself in reply to @Gordon

I run the new one at 25Hz rather than the old one's 50Hz as well,

Hmm. That should be fine for counting BPM, but other metrics will probably require a higher sampling rate. What is the range of tge sensor? In theory, could apps request a higher sampling rate for specific purposes?

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