ds3231 设置时间 以及连线

参考文章：[https://blog.csdn.net/ling3ye/article/details/74942928]

ds3231连线.JPG

程序

需要下载库

http://www.rinkydinkelectronics.com/library.php?id=74
设置时间的程序

#include 
 
// Init the DS3231 using the hardware interface
DS3231  rtc(SDA, SCL);
 
void setup()
{
  // Setup Serial connection
  Serial.begin(115200);
  // Uncomment the next line if you are using an Arduino Leonardo
  //while (!Serial) {}
  
  // Initialize the rtc object
  rtc.begin();
  
  // The following lines can be uncommented to set the date and time
  rtc.setDOW(THURSDAY);     // Set Day-of-Week to SUNDAY
  rtc.setTime(20, 43, 0);     // Set the time to 12:00:00 (24hr format)
  rtc.setDate(22, 8, 2019);   // Set the date to January 1st, 2014
}
 
void loop()
{
  // Send Day-of-Week
  Serial.print(rtc.getDOWStr());
  Serial.print(" ");
  
  // Send date
  Serial.print(rtc.getDateStr());
  Serial.print(" -- ");
 
  // Send time
  Serial.println(rtc.getTimeStr());
  
  // Wait one second before repeating :)
  delay (1000);
}

#include "TM1637.h"
#include 
#include "Sodaq_DS3231.h"
DateTime dt(2018, 5, 4, 14, 5, 0, 5); // 年 月 日 时 分 秒 星期。周日-周六对应0-6
 
//pins definitions for TM1637 and can be changed to other ports
#define CLK A0  
#define DIO A1
TM1637 tm1637(CLK, DIO);
  
void setup()
{
  tm1637.init();
 
  // 设置LED亮度。最暗到最亮 0-7。典型值2。
  tm1637.set(1);
 
  Wire.begin();
  rtc.begin();
 
  // 第一次使用时钟模块，或者需要校准时放开下列注释
  // 一旦校准完毕，继续注释掉，并再次上传
  // 定义dt的时候建议预留一些编译和上传的时间
  //rtc.setDateTime(dt);
}
 
// 时间分隔符闪烁标识
bool ShowPoint = true;
 
void loop()
{
  DateTime now = rtc.now();
 
  int h = now.hour();
  int mn = now.minute();
 
  int b0 = h / 10;
  int b1 = h % 10;
 
  int b2 = mn / 10;
  int b3 = mn % 10;
 
  tm1637.point(ShowPoint);
  tm1637.display(0, b0);
  tm1637.display(1, b1);
  tm1637.display(2, b2);
  tm1637.display(3, b3);
 
  ShowPoint = !ShowPoint;
 
  delay(1000);
 
}