How to read sleep graphs - Sleep as Android

As a general rule of thumb that applies to healthy individuals:

A healthy sleep (for a monophasic sleeper) is 7-8 hours long and consists of 5 sleep cycles where the first lasts for 70-100 minutes and the consequent cycles get longer but lighter. Each cycle consists of 4 stages lasting usually 5-15 minutes. Stage 1 and 2 are considered light sleep and this is the best time to be woken up in the morning.


This is a companion discussion topic for the original entry at https://docs.sleep.urbandroid.org//sleep/how_to_read_sleep_graphs.html

When tracking with my smartwatch (TicWatch Pro 3), the hypnograph fires not work, it shows awake for the whole night. Any ideas what’s wrong?

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I think I’m having the same problem, with a similar watch (Ticwatch Pro 2020), except it doesn’t trigger till a little after 6am. And, only some nights.

The watch wasn’t dead (that normally makes it flat red), the actigraphy was still being recorded as you can see, as was the HR data - none of which indicated permanent awakeness, so why is SaA giving up on the hypnogram after a certain time?

Just a thought… it says you’re snoring 100% of the night which might get marked as awake. Is there noise in the room that might make the app confused? I believe there’s an option to turn off the snore detection too. Might be worth a shot.