1.概述
本模块主要用到高精度时钟芯片DS3231。它是低成本、高精度I2C实时时钟(RTC)，具有集成的温补晶振(TCXO)和晶体。该器件包含电池输入端，断开主电源时仍可保持精确的计时。集成晶振提高了器件的长期精确度，并减少了生产线的元件数量。DS3231提供商用级和工业级温度范围，采用16引脚300mil的SO封装。模块自带2个定位孔，方便你将模块固定在其他设备。
2.规格参数
工作电压：3.3-5V（DC）
电流：50MA
最大功率：0.25W
工作温度：-10摄氏度 到 +50摄氏度
尺寸：47.6MM *23.8MM
接口：4PIN接口
通信接口：IIC总线接口,最高传输速度400KHz(工作电压为5V时)
时钟精度:0-40℃范围内,精度2ppm,年误差约1分钟
3.接线图
4.测试代码
#include <DS3231.h>
#include <Wire.h>
DS3231 clock;
bool century = false;
bool h12Flag;
bool pmFlag;
byte alarmDay, alarmHour, alarmMinute, alarmSecond, alarmBits;
bool alarmDy, alarmH12Flag, alarmPmFlag;
void setup() {
// Start the I2C interface
Wire.begin();
// Start the serial interface
Serial.begin(57600);
}
void loop() {
// send what’s going on to the serial monitor.
// Start with the year
Serial.print(“2”);
if (century) { // Won’t need this for 89 years.
Serial.print(“1”);
} else {
Serial.print(“0”);
}
Serial.print(clock.getYear(), DEC);
Serial.print(‘ ‘);
// then the month
Serial.print(clock.getMonth(century), DEC);
Serial.print(” “);
// then the date
Serial.print(clock.getDate(), DEC);
Serial.print(” “);
// and the day of the week
Serial.print(clock.getDoW(), DEC);
Serial.print(” “);
// Finally the hour, minute, and second
Serial.print(clock.getHour(h12Flag, pmFlag), DEC);
Serial.print(” “);
Serial.print(clock.getMinute(), DEC);
Serial.print(” “);
Serial.print(clock.getSecond(), DEC);
// Add AM/PM indicator
if (h12Flag) {
if (pmFlag) {
Serial.print(” PM “);
} else {
Serial.print(” AM “);
}
} else {
Serial.print(” 24h “);
}
// Display the temperature
Serial.print(“T=”);
Serial.print(clock.getTemperature(), 2);
// Tell whether the time is (likely to be) valid
if (clock.oscillatorCheck()) {
Serial.print(” O+”);
} else {
Serial.print(” O-“);
}
// Indicate whether an alarm went off
if (clock.checkIfAlarm(1)) {
Serial.print(” A1!”);
}
if (clock.checkIfAlarm(2)) {
Serial.print(” A2!”);
}
// New line on display
Serial.println();
// Display Alarm 1 information
Serial.print(“Alarm 1: “);
clock.getA1Time(alarmDay, alarmHour, alarmMinute, alarmSecond, alarmBits, alarmDy, alarmH12Flag, alarmPmFlag);
Serial.print(alarmDay, DEC);
if (alarmDy) {
Serial.print(” DoW”);
} else {
Serial.print(” Date”);
}
Serial.print(‘ ‘);
Serial.print(alarmHour, DEC);
Serial.print(‘ ‘);
Serial.print(alarmMinute, DEC);
Serial.print(‘ ‘);
Serial.print(alarmSecond, DEC);
Serial.print(‘ ‘);
if (alarmH12Flag) {
if (alarmPmFlag) {
Serial.print(“pm “);
} else {
Serial.print(“am “);
}
}
if (clock.checkAlarmEnabled(1)) {
Serial.print(“enabled”);
}
Serial.println();
// Display Alarm 2 information
Serial.print(“Alarm 2: “);
clock.getA2Time(alarmDay, alarmHour, alarmMinute, alarmBits, alarmDy, alarmH12Flag, alarmPmFlag);
Serial.print(alarmDay, DEC);
if (alarmDy) {
Serial.print(” DoW”);
} else {
Serial.print(” Date”);
}
Serial.print(” “);
Serial.print(alarmHour, DEC);
Serial.print(” “);
Serial.print(alarmMinute, DEC);
Serial.print(” “);
if (alarmH12Flag) {
if (alarmPmFlag) {
Serial.print(“pm”);
} else {
Serial.print(“am”);
}
}
if (clock.checkAlarmEnabled(2)) {
Serial.print(“enabled”);
}
// display alarm bits
Serial.println();
Serial.print(“Alarm bits: “);
Serial.println(alarmBits, BIN);
Serial.println();
delay(1000);
}
5.测试结果
先我们需要先加载ds3231的库，加载完成后上传代码。上传代码完成后上代开串口监视器，设置波特率为57600，我们将看到DS3231检测到的日期、时间、温度、闹钟等等相关信息。
6.资料下载链接
Arduino IDE/Mixly/Scratch/pyhon编程使用资料下载链接
链接：https://pan.baidu.com/s/1TZRg8_eSaEcbYPmJ1667GA
提取码：keye