DS1307 Real Time Clock Module (RTC)

This is the Real Time Clock (RTC) Module, this little breakout that uses the DS1307 to keep track of the current year, month, day as well as the current time. The module comes fully assembled and includes a small CR2016 Lithium coin cell battery that will run the RTC for a minimum of 9 years (17 years typical) without an external 5V power supply. The DS1307 RTC is accessed via the I2C protocol.  This tiny module embraces DS1307 time module, DS18B20 temperature module and AT24C32 storage module. DS1307 and AT24C32 are connected to IIC bus. And DS18B20 can be visited via DS pin.