MiBand 2 sleep Detection?

Everyone knows it’s single, you come home late then you want to eat something and watch some TV. And then it happens you haven’t set a sleep timer and just fall asleep on the couch, all the lights are on the TV and you wake up in the morning at 5-6 o’clock and think damned!
It would be great if the China Werabel MiBand 2 registers that you fall asleep until you report it to your SmartHome and everything is turned off.

Is there a solution?