Description

Module parameters:

1. Size: 38mm (length) * 22mm (width) * 14mm (height)

2.Weight: 8g

3. Working voltage: 3.3--5.5V

4. Clock chip: high-precision clock chip DS3231

5. Clock accuracy: within the range of 0-40℃, the accuracy is 2ppm, the annual error is about 1 minute

6. With 2 calendar alarm clocks

7. Programmable square wave output

8. The real-time clock generates seconds, minutes, hours, day of the week, date, month and year, and provides leap year compensation with a valid period of up to 2100

9. The chip has its own temperature sensor with an accuracy of ±3℃

10.Memory chip: AT24C32 (storage capacity 32K)

11.IIC bus interface, transmission speed 400KHz (when working voltage is 5V)

12. Can be cascaded with other IIC devices, the 24C32 address can be modified by short-circuiting A0/A1/A2, the default address is 0x57

13. With battery CR2032, to ensure that the clock still moves normally after the system is powered off

14.Packing method: single anti-static packaging

Wiring instructions (take Arduino uno r3 as an example):

SCL→A5

SDA→A4

VCC→5V

GND→GND

Shipping list:

1. One DS3231 module