The module can work on either 3.3 or 5 V which makes it suitable for many development platforms or microcontrollers. The battery input is 3V and a typical CR2032 3V battery can power the module and maintain the information for more than a year. The module uses the I2C Communication Protocol which makes the connection to the Arduino Board very easy.
- Size: 38mm (length) * 22mm (W) * 14mm (height)
- Operating voltage: 3.3 – 5 .5 V
- DS3231M at the core
- Clock Accuracy: 5ppm 0-40 ºC
- Two programmable alarms
- Programmable square-wave output
- DS3231M Datasheet
- LIR2032 / CR2032 backup battery holder for uninterrupted time management (battery not included)
- Wiring instructions (with Arduino Uno R3 for example):
- SCL → A5
- SDA → A4
- VCC → 5V
- GND → GND
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