Matter SDK and CHIP in deep sleep mode

[FlorianAchatz]

Hi,
I'm currently working on a LIT-ICD device with an ESP32-C6 microcontroller. Due to the long battery life, we're considering using the ESP deep sleep mode and leaving the sensor work to the ULP.

Is there any approach to prepare the Matter stack for deep sleep mode (CPU goes through reset and 16kB of RAM are retained)? Measures such as reallocating memory to LP RAM to back up internal data might be necessary.

[wqx6]

I don't think deep sleep will save more power than light-sleep ICD. The RAM will be powered off on deep sleep, so all the CASE sessions and subscriptions should be recovered after deep sleep, this will cost much more power than light sleep.