12-13-2021, 06:24 AM
We've only got movement (accelerometer) and heart rate, neither of which are particularly good indicators of sleep state from what I've read. The heart rate is rather inaccurate at the moment too, by more than enough to throw off sleep state estimates. Some argue that wrist mounted optical sensors are never accurate enough for this use, so on its own a PineTime on its own may never be capable of accurate sleep tracking, and getting misled by inaccurate tracking is worse than no tracking at all.
You could potentially use it in combination with bluetooth sensors such as a chest strap for heart rate and/or breathing rate and depth measurement. I don't think we have any code yet for connecting to such devices, recording or analysis of their results. However it's done, someone will need to be able to record data with both the sensors and a separate known reliable system in order to verify accuracy. I wouldn't like to guess if or when this might happen - we could be lucky and have a sleep researcher wanting an inexpensive and portable device they can customise.
You could potentially use it in combination with bluetooth sensors such as a chest strap for heart rate and/or breathing rate and depth measurement. I don't think we have any code yet for connecting to such devices, recording or analysis of their results. However it's done, someone will need to be able to record data with both the sensors and a separate known reliable system in order to verify accuracy. I wouldn't like to guess if or when this might happen - we could be lucky and have a sleep researcher wanting an inexpensive and portable device they can customise.