ESP8266 Community Forum

What's in :
https://github.com/0x6e/ESP8266-RTC-Example

EDIT: lol: I didn't realize there were a page 2 and 3 in this topic.

martinayotte wrote:ESP8266 doesn't have an internal RTC.
You can either add an external one, or simply do an NTP Request at power-up and keep a software clock updated using Time library.

Not according to https://www.espressif.com/sites/default ... eet_en.pdf
It also has a VDD_RTC pin specifically for it. But I don't think it's available in software. Just to keep a timer running while the CPU is off and provide reliable timing for the wifi and wake it up from sleep.

Dolf Andringa wrote:Not according to https://www.espressif.com/sites/default ... eet_en.pdf
It also has a VDD_RTC pin specifically for it. But I don't think it's available in software. Just to keep a timer running while the CPU is off and provide reliable timing for the wifi and wake it up from sleep.

It is not a Real Time Clock, but a Real Time Counter, and this counter is reset at power up ...