#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <Servo.h>            //加载文件库
int pos = 0;
Servo myservo;


#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 20, 4); // I2C地址为0x27，显示屏为


#define TrigPin 13      //超声波发射引脚
#define EchoPin 12      //超声波接收引脚

void setup() {
  Serial.begin(9600);
  pinMode(3,INPUT_PULLUP);
  pinMode(4,INPUT_PULLUP);
  pinMode(8,INPUT_PULLUP);  //模式切换
  lcd.begin(16, 2);
  dht.begin();
  lcd.print("Temperature:");
  lcd.setCursor(0, 1);
  lcd.print("Humidity:");
  lcd.setCursor(0, 2);
  lcd.print("lux:");
 

  myservo.attach(9, 500, 2500);          //修正脉冲宽度

  pinMode(TrigPin, OUTPUT);
  pinMode(EchoPin, INPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  digitalWrite(6, LOW); //red
  digitalWrite(7, LOW);  //green

  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  digitalWrite(11, LOW);
}
int open=0;
int close=0;
int closed=0;
int alarm=0;
bool flag;
void loop() {

   digitalWrite(TrigPin, LOW);
   delayMicroseconds(2);
   digitalWrite(TrigPin, HIGH);//发一个10ms的高脉冲去触发TrigPin
   delayMicroseconds(10);
   digitalWrite(TrigPin, LOW);
 
   //float distance_mm = pulseIn(EchoPin, HIGH) * 0.1724138;      //单位mm
   float distance_cm = pulseIn(EchoPin, HIGH) / 58.0;      //单位cm
   //Serial.println(String("Distance: ") + String(distance_mm) + String(" mm"));
   Serial.println(String("Distance: ") + String(distance_cm) + String(" cm"));

   if(distance_cm<150){
      digitalWrite(6, HIGH);   
   }
   else
     digitalWrite(6, LOW); 

  if(digitalRead(3)==LOW){  //open
      open=1;
      close=0;
  }else
  {

  }
  if(digitalRead(4)==LOW){    //close
      open=0;
      close=1;
  }else
  {

  }
  if(open==1&&close==0){
      for (pos = 0; pos <= 180; pos += 1) {       //pos+=1等价于pos=pos+1
    myservo.write(pos);
    delay(15);					
      }
      open=0;
      closed=0;
  }
  if(open==0&&close==1&&closed==0){
        for (pos = 180; pos >= 0; pos -= 1) {
    myservo.write(pos);
    delay(15); 					
      }	
      close=0;		
      closed=1;		   
  }
   
  int ldr=analogRead(A0);
  Serial.println(analogRead(A0));
  int cloth=analogRead(A3);
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  lcd.setCursor(12, 0);
  lcd.print(temperature);
  lcd.setCursor(9, 1);
  lcd.print(humidity);
  lcd.setCursor(4, 2);
  lcd.print(ldr);
  
  if(humidity>80||ldr>800||temperature<45){
     alarm=1;
     open=0;     //close
      close=1;
  }
  if(alarm){
    digitalWrite(7, HIGH);//green
    
    for (int i = 200; i <= 300; i++)
     {
      tone(10, i);
       delay(2);
    }
    
    alarm=0;
  }
  else
  {
    digitalWrite(7, LOW);
    noTone(10);
  }
  if(digitalRead(8)==LOW){
     flag=!flag;
  }
  if(flag){
  digitalWrite(11, HIGH);
  int mappedValue = map(analogRead(A3), 0, 1023, 0, 180); // 将原始值映射到0到100的范围内
  myservo.write(mappedValue);
  }
  else
   digitalWrite(11, LOW);
  delay(500);
}