Arduino UNO、LCD1602、DS1307制作带日历星期的数字时钟

可乐丸子

下面介绍使用Arduino UNO、LCD1602、DS1307制作带日历星期的数字时钟
硬件连接：
DS1307模块的SDA SCL连接Arduino UNO数字输入输出上面一排的SDA SCL，DS1307的VCC GND连接Arduino UNO的ICSP的VCC GND
ICSP排针排列如下

LCD1602的VCC GND SDA SCL连接到Arduino UNO的5V GND A4 A5
连接好之后上电，打开Arduino IDE，打开项目--加载库--管理库，搜索安装rtllib库

如果之前没有安装过LiquidCrystal_I2C库还需要安装这个，安装完成后新建sketch，输入下面代码
#include <Wire.h>#include <RTClib.h>#include <LiquidCrystal_I2C.h>LiquidCrystal_I2C lcd(0x3F,16,2);RTC_DS1307 RTC;char daysOfTheWeek[7][12] = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};void setup () {    Serial.begin(9600);    lcd.init();    lcd.backlight();    Wire.begin();    RTC.begin();    RTC.adjust(DateTime(__DATE__, __TIME__));  }void loop () {      DateTime now = RTC.now();        Serial.print(now.year(), DEC);    Serial.print('-');    Serial.print(now.month(), DEC);    Serial.print('-');    Serial.print(now.day(), DEC);    Serial.print(' ');    Serial.print(now.hour(), DEC);    Serial.print(':');    Serial.print(now.minute(), DEC);    Serial.print(':');    Serial.print(now.second(), DEC);    Serial.print(' ');    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);    Serial.println();        lcd.setCursor(0,0);    lcd.print(now.year(), DEC);    lcd.print('-');    lcd.print(now.month(), DEC);    lcd.print('-');    lcd.print(now.day(), DEC);    lcd.print(' ');    lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);    lcd.setCursor(0,1);    lcd.print(now.hour(), DEC);    lcd.print(':');    lcd.print(now.minute(), DEC);    lcd.print(':');    lcd.print(now.second(), DEC);    lcd.print(' ');    delay(1000);}
上传后效果如下