Any time you want to know what time it is. If I have missed the dating, or if it is the mealtime for my three months child. The RTC module can provides you a real-time clock. You can make the controller to ask the module: hi,buddy, what time it is. At the same time, Do not forget to install a small coin cell which can serve you for more than six months.
Features：
- DS1307 I2C real-time clock chip (RTC)24C32 32K I2C EEPROM memory
- DS1307 can not read and write.
- Fully charged, it can provide the DS1307 timing .
- Leads to the a DS1307 clock pin, to provide the clock signal for the microcontroller.
- Can be cascaded to other I2C devices.
