Bangle.js 2 Cutting Edge - new heart rate algorithm

Yes, that's very nice! And thanks again for these tests - nothing beats having real data to make decisions with.

So what do we think about setting the sport mode up? We have a few options:

• Default to just setting sport mode = 1 all the time (easy - maybe slightly longer time to get a heart rate?)
  
• Use the accelerometer 'motion' value and if there was significant motion in the last ~30 seconds, switch to sport mode (this appears to be what the manufacturer-provided thing does)
  
• Check for steps from the step counter in the last 30 seconds (although maybe this won't work for cycling/etc?)