05-17-2021, 01:42 AM
(07-20-2020, 11:29 AM)bigpotato Wrote:(07-20-2020, 08:53 AM)danielt Wrote: What do you mean by a HRV sensor? In principle both PPG (optical) and ECG (electrical) sensors can be used to measure heart rate variability, although admitedly an ECG would be much more stable during exercise.
Some time ago I did find bosch sensor which would be small and low power, but I think this one I found matches these rules. It's cheap, low power, it checks for pulse and blood oxygen. https://www.banggood.com/MAX30102-Heartbeat-Frequency-Tester-Heart-Rate-Sensor-Module-Puls-Detection-Blood-Oxygen-Concentration-Test-p-1354772.html?cur_warehouse=CN
Thank you for the link I do feel the current PPG sensor that ships with PineTime may not be as accurate but I am working on HRV using pyhrv libraries and it does work you can get convert ppg to hrv with few lines of code. But the App crashes https://youtu.be/8HOqxh4lhX0 I was able to fix the crash but something with micropython Environment seems to through the code off