#include <LiquidCrystal_I2C.h>  //lcd库文件
#include "DHTesp.h"    //dht22传感器库
#include "RTClib.h"   //时钟模块库



#define I2C_ADDR    0x27   //lcd  的iic地址
#define LCD_COLUMNS 20   //列宽20个字符
#define LCD_LINES   4   //行宽 4个字符
const int DHT_PIN = 15;   //温湿度传感器的连接引脚

RTC_DS1307 rtc;    //对象

DHTesp dhtSensor;  //对象
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);  //对象

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);           //串口初始化  波特率115200
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);    //温湿度传感器初始化
 if (! rtc.begin()) {                              //时钟模块初始化
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  lcd.init();                  //lcd2004初始化
  lcd.backlight();     //亮屏

  // Print something
  lcd.setCursor(0, 0);  //光标位置
  lcd.print("Smart greenhouse"); 
  lcd.setCursor(0, 1);
  lcd.print(" IoT");
  delay(1000);
  lcd.clear();  //清屏

}

void loop() {
  DateTime now = rtc.now();   //获取最新时间

  TempAndHumidity  data = dhtSensor.getTempAndHumidity();  //获取温湿度
  String shijian = String(now.year())+"/"+String(now.month())+"/"+String(now.day())+" "+String(now.hour())+":"+String(now.minute())+":"+String(now.second())+ "  ";
  int lx = map(analogRead(27), 4096, 0, 0, 10000);  //映射数值



  lcd.setCursor(0, 0);
  lcd.print("Temp: " + String(data.temperature, 2) + " C   ");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: " + String(data.humidity, 1) + "%   ");
    lcd.setCursor(0, 2);
  lcd.print("illumin: " + String(lx) + " Lux  ");
    lcd.setCursor(0, 3);
  lcd.print(String(shijian));

  

 


  delay(10); // this speeds up the simulation
}