In this tutorial we will learn how to use DS3231 Real Time Clock with the Arduino.
About the DS3231 Module:
The DS3231 is a low-cost, Real Time Clock Module which can maintain hours, minutes and seconds, as well as, day, month and year information. The module can work on either 3.3 or 5V. The battery input is 3V and a typical CR2032 3V battery can power the module and maintain the information for more than a year.