Using VOC with DeepSleep

[SphaeroX]

Is there a way to read the VOC value even when the Esp32 controller goes into DeepSleep?

With me then always appears only the value 0. I suspect it is because he loses the data for the calculation of the VOC index in the DeepSleep, can that be?

[tyeth]

That sounds about right. You can declare a variable to be stored in RTC memory, with a macro prefix, which will be maintained on wake. There is 8K of RTC memory available I believe, I have this page bookmarked https://forum.arduino.cc/t/loading-strings-text-into-esp32-rtc-memory/953139/4 and this set of sketches https://github.com/G6EJD/ESP32_RTC_RAM