PCF8563 - Real Time Clock and Calendar - I2C Driver - ESP8266 Modules

If you need for your ESP8266 modules a proper RTC, might worth to take in consideration also PCF8563. Good price in small quatities and easy to implement a I2C driver for it.

First test:

Update Time and Date with Google page:

For more details:

PCF8563 - 1 - Adapter -1.jpg

PCF8563 - 3 - CBDB - 3.jpg