Dsloger DS3231 AT24C32 IIC Precision Real Time Clock Module Memory Module Arduino - calendar Alarm clock with Two Programmable square-wave output - Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation - Chip temperature sensor comes with an accuracy of +- 3 Celsius - IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V) - Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57