How does Xiaomi know to be awake when he is healthy?

When you go to sleep, the acceleration sensor swings with large amplitude and high frequency, which means you are awake.

The three states of Xiaomi Health Monitor: awake, light sleep and deep sleep, and the corresponding heart rate state should be the lowest and most stable during deep sleep, all of which are displayed by sleep and acceleration sensors.

Xiaomi Health app is a health detection software that can detect and analyze. The software can measure the user's heart rate, pulse and other physical factors, and provide the most accurate body feedback information.