ACROBOTIC DS3231 RTC Real Time Clock AT24C32 I2C EEPROM Memory Module Breakout Board for Arduino Raspberry Pi ESP8266

Want to easily and accurately keep track of seconds, minutes, hours, week, date, month and year information? Then the DS3231 Real-Time Clock RTC is for you! The DS3231 is a low-cost, high-precision I2C RTC with integrated crystal oscillator (TCXO) and crystal. The device includes a battery input that maintains accurate timing when the main power is turned off. The integrated crystal improves the long-term accuracy of the device and reduces the number of components in the production line. This breakout board makes it easy to connect this RTC to your microcontroller board or single-board computer such as Arduino, ESP8266, BeagleBone or Raspberry Pi! The four pins correspond to power (VCC, GND) and I2C communication (SDA, SCL). We've included in our design pull-up resistors on the I2C lines as customary. With a coin cell (CR2032-sized, not included) plugged into the adapter on the back of the board, you can get years of precision timekeeping, even when main power is lost. This makes it a perfect solution for datalogging, clocks, or any application where time tracking is of the essence. Features: Size: 38mm × 22mm × 14mm Operating voltage: 3.3~5.5V Clock accuracy: 0~40? range, accuracy of 2ppm, annual error ~1 minute Includes 2 calendar alarms Programmable square-wave output RTC generates seconds, minutes, hours, days, days, months, and years, and provides leap year compensation to 2100 Integrated temperature sensor with ±3? accuracy CR2032 battery adapter (battery not included) We have written useful guides for getting you started with the DS3231 Real-Time Clock: ESP8266: http://learn.acrobotic.com/tutorials/