Mi band app has a sleep window hard coded in the app and as well as in the mi band it self. when that window starts like 12-6 am is the window it will start monitoring your movements, if it detects slight movement that are not continuous it treats it as a light sleep and subsequently it calculates the deep sleep time.. In scientific the terms deep sleep is called non-rem-3 (fact: deep sleep = non-rem-3) and it really should be like 10% to 20% of your total sleep. so if you are getting 50% of non-rem-3 that would be definitelly too much and the mi band is capturing other stages as well.. I'd be interested to know what readings people are getting for there deep sleeping patterns, as my gf has bought one and while it seems to measure....
The data monitored by these two sensors is the basis for judging whether my xiaomi mi band track my in deep sleep or not. the acceleration sensor can monitor whether the position of the hand ring is moving great technology. in deep sleep state, the human arm is basically not moving.. The xiaomi mi band 3 is the chinese company’s new budget fitness tracker, and one that seems to be proving that the humble tracker is still very much alive. at least it is in china, where the. Compatible with mi 4, mi 3, redmi note 4g, or any device with android 4.4 and above. compatible with iphone models 4s and above that run on ios 7.0 and above. note: mi band's phone unlocking feature requires smartphones with miui or android 5.0 and above..
