wake up esp32 at the end of the month

[sionut]

Hi,

The subject says it all. Is it possible to wake up ESP32 from deep sleep at the end of each month ? I would like to use it only a few minutes on the last day of the month. Power consumption is very important, this is why I would like to wake it up as seldom as possible.

Thank you !

[ESP_Sprite]

From what I know, you should just be able to put the ESP32 into deep sleep for 30*24*60*60 (Or 31, or 29, depending on the month) seconds. Easiest is to have hardware that has a 32KHz crystal connected to the ESP32, otherwise your wakeup time will be off by a few days or so.

[sionut]

I'm a newbie trying to enter in this domain..

Could you suggest what exactly I should buy / some schematics maybe ?

Thank you !

[PeterR]

If in doubt try on an evaluation board. EDIT Like an EVB
I have not checked EVB RTC clocks but otherwise its a solid starter. You can get started on PRIME next day & with an EVB, some dupont n micreo/ada/whatever board.
Seems an easier entry then laying a PCB etc.