ESP8266 Community Forum

Posted: **Sun Jun 04, 2017 12:40 pm**

Hi everyone,
i'm looking after a timer to wake up the esp8266 after a timer over than 71 minutes (current limitations is 32bits for a timer in µs).
Therefore i'm looking for a timer consuming very low power (it is dedicated to an application powered by batteries) and able to get a timer until one day.
Thank you for your help

Posted: **Sun Jun 04, 2017 3:23 pm**

You can use a proper RTC like the DS3231 or the PCF8563.
In the links above you have ESP8266 usage examples for both.

Posted: **Sun Jun 04, 2017 3:47 pm**

or you can just implement a software counter stored in nonvolatile intern rtc ram.
use board search for examples.

Posted: **Sun Jun 04, 2017 10:49 pm**

trackerj wrote:You can use a proper RTC like the DS3231 or the PCF8563.
In the links above you have ESP8266 usage examples for both.

Ok, it seems is one solution

or you can just implement a software counter stored in nonvolatile intern rtc ram.
use board search for examples. - See more at: posting.php?mode=quote&f=13&p=66724#sthash.RGqUCzIY.dpuf

Ok, i know how to store in RTC but what is the way to use this counter to wake up or not?

ESP8266 Community Forum

Looking after timer low power to get deep sleep over 71 min

Looking after timer low power to get deep sleep over 71 min

Re: Looking after timer low power to get deep sleep over 71

Re: Looking after timer low power to get deep sleep over 71

Re: Looking after timer low power to get deep sleep over 71