ok, I see. In UI-FLOW you could use an Execute code block and add something like this for deep sleep:

import machine

#sleep for 10 seconds
machine.deepsleep(10000)

or light sleep:

import machine

#sleep for 10 seconds
machine.lightsleep(10000)

BTW: I found a nice tutorial about MicroPython and sleep modes here.

Cheers
Felix

Thank you for you quick answer. Looks like you're referring to the Arduino library of M5Stack.
I wonder if there is an equivalent function in UI-FLOW? I'm currently using UI-Flow to program my Fire.
I can also try to burn the Arduino firmware, but I'm worried if I can control the UI as easily as in UI-Flow.

Thx,

yes, there is. Two functions are available for that POWER::lightSleep() and POWER::deepSleep()

Also have a look at the sleep example, it uses light sleep and deep sleep functionality.

Cheers
Felix