ESP32 Forum

I would like to understand is it a way to power internal RTC from the battery (e.g. CR2032) on the new ESP32-WROOM-32E, to guarantee that internal RTC will work if 220V power is down? It's a pity that we must use an additional RTC chip and external crystal clock while ESP32-WROOM-32E already has them.

Thank you.

Sorry, the ESP32 does not have a separate pin that only powers the RTC; you can't use a backup battery with it.