Library to access DS1307, DS1337/8, MCP7941x and PCF85263 real-time clocks.
Read, set and configure DS1307 and similar I2C real-time clocks. Supported devices include DS1307, DS1337, DS1338, MCP79410, MCP79411, MCP79412 and PCF85263. Time/date is available as a standard tm struct. Unix timestamps (seconds since 1970) can also be computed. Can autoprobe to find device address on the I2C bus. GNU LGPL v2.1.

Author: Steve Marple

Maintainer: Steve Marple

Read the documentation


This library is compatible with all architectures so you should be able to use it on all the Arduino boards.


To use this library, open the Library Manager in the Arduino IDE and install it from there.