This RTC module with DS3231 compatible real time clock chip and additional 32kB EEPROM connects to micro controllers like Arduino or Raspberry Piby a 2-wire I2C bus. A rechargeable lithium cell LR2032 can be installed to keep the correct time also when the power supply is disconnected.
Please find data sheets for DS3231 and 24C32N chips online.
- 2-wire connection SDA/SCL
- Operating voltage 3.3V – 5.5V DC
- Libraries (for example Arduino) available
The on-board charging circuit is designed for rechargeable lithium coin cells like ML2032, MIL2032, MR2032 etc. If you want to use this module with a non-rechargeable battery, you must follow the provided instructions to disable the charging circuit.