Package Included

- 1 x DS3231SN AT24C32 IIC Module Precision RTC Real Time Clock Module (Battery not included - CR2032)

Description:

- The clock operates in either the 24 hours or band / AM / PM indication of the 12-hour format.

Module parameters:
1. Size: 38mm (length) * 22mm (W) * 14mm (height)
2. Weight: 8g
3. Operating voltage :3.3 - 5 .5 V
4. Clock chip: high-precision clock chip DS3231
5. Clock Accuracy: 0-40 range, the accuracy 2ppm, the error was about 1 minute
6. Real-time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
7. Memory chips: AT24C32 (capacity 32K)
8. IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
9. With rechargeable battery CR2032, to ensure the system after the power failure, the clock move any natural normal

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

Reference

• https://circuitdigest.com/microcontroller-projects/interfacing-ds3231-rtc-with-arduino-and-diy-digital-clock
• https://www.diyengineers.com/2020/12/24/ds3231-with-arduino/
• https://lastminuteengineers.com/ds3231-rtc-arduino-tutorial/