Things that survive sleep

[AndySmithers]

First of all, this is an absolutley awesome project!
I have my Omote working pretty well.
I only have TV, SmartHome switches and a GoodWeather AC but they all work perfectly.
One thing has eluded me though:
I'd like to have things - variables, states etc that survive sleep mode.
For example, my AC controller simply defaults to the initial startup state (OFF) when coming out of sleep - even if I have just used it to turn ON the AC.
How do I go about making the ON state non-volatile, for example.

Then it got me thinking: when coming out of sleep the Omote "knows" what scene is active.
How does it do this? I can't follow in main.cpp where (and how) this is non-volatile.

Any pointers? (pun intended!)

[KlausMu]

Such settings are stored in the so called NVS (non volatile storage) on the flash.
https://github.com/OMOTE-Community/OMOTE-Firmware/blob/main/hardware/ESP32/preferencesStorage_hal_esp32.cpp

If your AC is not able to being queried for its current state, then this could be a good solution.