====== DS3231 - Real Time Clock & Memory ======
I2C Precision (RTC) Real Time Clock Memory

{{:components:ds3231-1.png?nolink&200|}} {{:components:ds3231-2.png?nolink&200|}}

Module parameters:
  *  size: 38mm (long) * 22mm (wide) * 14mm (High)
  *  weight:8g
  *  Operating Voltage: 3.3--5.5V
  *  Clock Chip: Precision clock chip DS3231
  *  Clock Accuracy: 0-40 °Within range,Accuracy2ppm,In error about1minute
  *  A programmable square-wave output
  *  Real-time clock generating seconds, minutes , hours, day , date , month and year time, and provide valid until2100Compensation leap year
  *  Internal temperature sensor chip comes, Accuracy± 3 °
  *  Memory chip: AT24C32 (Storage capacity32K)
  *  I2C Bus Interface, The maximum transmission speed400KHz (Operating voltage 5V)
  *  Cascadable OtherIICequipment, 24C32Address by short circuitA0 / A1 / A2modify, __The default address is0x57__
  *  With rechargeable batteryLI__R2032__,Ensure the system after power failure, Any natural clock normal walking

Wiring instructions :
  * SCL → A5
  * SDA → A4
  * VCC → 5V
  * GND → GND