Anyone find a way to sense a trigger via Falling Asleep? I'd like to use one of the free non plan apps to sense me having fallen asleep & then turn down or off the Coldness of A/C

I have the same question.
Found this :man_shrugging:

If you have an Android phone with Tasker (free) and Sleep as Android (free) you can set up a trigger from Sleep and have that shoot off a message to Home Assistant.

The options available are:

I would assume the “REM” option may be the closest one you’re interested in.

You could follow the steps in here to get you to communicate between Tasker and HA.