Arduino UNO、LCD1602、DS1307、DHT11制作带星期温湿度的数字日历时钟

可乐丸子

下面介绍使用Arduino UNO、LCD1602、DS1307、DHT11制作带星期温湿度的数字日历时钟的方法
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
DHT11温湿度传感器的VCC GND DATA连接到Arduino UNO的3.3V GND 数字输入输出7
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，接着搜索安装DHT Sensor Library by Adafruit库，建议安装低于1.2.2版本，如果安装1.3.0版本会报错缺少Adafruit_Sensor.h，安装1.3.0版本DHT库的用户还需要安装Adafruit Unified Sensor库才能解决编译报错

安装完库之后新建sketch输入下面代码
#include <Wire.h>#include <RTClib.h>#include "DHT.h"#include <LiquidCrystal_I2C.h>#define DHTPIN 7#define DHTTYPE DHT11DHT dht(DHTPIN, DHTTYPE);float hum;float temp;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();    dht.begin();    Wire.begin();    RTC.begin();    RTC.adjust(DateTime(__DATE__, __TIME__));  }void loop () {    int h = dht.readHumidity();    int t = dht.readTemperature();        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()]);    delay(1000);    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(' ');    lcd.setCursor(9,1);    lcd.print(t);    lcd.print("C");    lcd.print(" ");    lcd.print(h);    lcd.print("%");}上传后运行效果如下