07-21-2020, 12:47 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-Heartb...rehouse=CN
Vendor has offer me a new heartbeat sensor integrate with three LED light (Green, RED, and IR) for both heart-beat and oxygen level measure that can fit into exisitgn Pinetime case. However, I have rejected the offer due to 1) higher sensor cost ($3-4 higher) and 2) no sure how well its work or just hype.
I still keep this as open mind. In near future, if we think oximeter is good feature (assume able to produce accurate result) to have, we can revisit this option (keep in mind this add cost).