Bangle.js 2 Cutting Edge - new heart rate algorithm

ok similar to the last time I did the following small test with each part for approx one minute:

1. sitting still
   
2. walking slow
   
3. walking fast
   
4. running without moving
   
5. sitting still
   
   

Result is bt chest belt in blue, firmware 2v17.55 in green, firmware 2v17.56 in sports mode in red. X-Axis is hrm event count (~1 second), y-axis is BPM.

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