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RTC of ESP32-WROOM-32E

Posted: Sun May 02, 2021 4:06 am
by Warlib
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.

Re: RTC of ESP32-WROOM-32E

Posted: Thu May 06, 2021 3:48 am
by ESP_Sprite
Sorry, the ESP32 does not have a separate pin that only powers the RTC; you can't use a backup battery with it.