Module parameters:
1. Size: 38mm (length) * 22mm (width) * 14mm (height)
2. Weight: 8g
3. Operating voltage: 3.3--5.5V
4. Clock chip: high precision clock chip DS3231
5. Clock accuracy: 0- Within the range of 40℃, the accuracy is 2ppm, the annual error is about 1 minute
6. With 2 calendar alarms
7. Programmable square wave output
8. Real-time clock generates seconds, minutes, hours, day, date, month and year time, and provides the validity period Compensation for leap year to 2100
9. Internal temperature sensor with accuracy of ±3℃
10. Memory chip: AT24C32 (storage capacity 32K)
11. IIC bus interface, high transmission speed 400KHz (when working voltage is 5V)
12. IIC other devices may be cascaded, addresses may 24C32 / A1 / A2 modified by shorting A0, 0x57 default address is
13. CR2032 with battery, to ensure the system after a power failure, then any normal walking clock
14. packing: single anti-static packaging
wiring Instructions (taking Arduino uno r3 as an example):
SCL→A5
SDA→A4
VCC→5V
GND→GND
Delivery list:
1. One DS3231 module (with CR2032 battery)