Parameters
1. Size: 38mm (L) * 22mm (W) * 14mm (H)
2. Weight: 8g
3. Operating voltage: 3.3-5.5V
4. Clock chip: high-precision clock chip DS3231. (there are 3 different chips for this clock module: DS3231N, DS3231SN and DS3231M, we send it by randomly)
5. Clock Accuracy: 0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
6. Memory chips: AT24C32 (storage capacity 32K)
7. Real time clock generator seconds, minutes, hours, day, date, month and year. And provide valid until the year 2100 leap year compensation
8. Chip temperature sensor comes with an accuracy of ± 3 ℃
9. IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
10. Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
Pin Description:
32KHz：32KHz output
SQW：Active LOW Interrupt or Square wave output
SCL：Serial Clock Input
SDA：Serial Data I/O
VCC：DC Power Pin
GND：Ground
Wiring instructions
SCL → A5
SDA → A4
VCC → 5V
GND → GND
Package Included:
6 X DS3231 Clock module (Battery is included)