RTC of ESP32-WROOM-32E

Warlib
Posts: 2
Joined: Thu Feb 21, 2019 1:00 pm

RTC of ESP32-WROOM-32E

Postby Warlib » Sun May 02, 2021 4:06 am

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.

ESP_Sprite
Posts: 9719
Joined: Thu Nov 26, 2015 4:08 am

Re: RTC of ESP32-WROOM-32E

Postby ESP_Sprite » Thu May 06, 2021 3:48 am

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

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