DS3231 Time Sensor

Gives a project a clock that keeps running when the Arduino is powered off. A backup cell maintains date and time for years, so an unplugged data logger or alarm knows the correct time the moment it wakes up. Communicates over I2C using two pins, providing seconds through years with automatic leap year handling. Essential for any project that timestamps data or acts on a schedule. Keeps time through power loss on a backup cell; I2C interface uses only two pins; Full calendar with automatic leap year handling; Removes the need to reset the time on every restart