#include <Servo.h>
#include<DHT.h>
#define DHTTYPE DHT22
#define DHTPIN 8 
#define TRIG 9
#define ECHO 5
#define MQSEN A5
#define Buzzer1 4
#define Buzzer2 3
#define LDR A3
#define RED1 6
#define GREEN1 2
#define RED2 13
#define RED3 7
#define RED4 12
Servo frontdoor;
DHT Tsen(DHTPIN, DHTTYPE);
void setup()
{
  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
  pinMode(RED1, OUTPUT);
  pinMode(GREEN1, OUTPUT);
  frontdoor.attach(11);
  pinMode(RED2, OUTPUT);
  pinMode(MQSEN, INPUT);
  pinMode(Buzzer1, OUTPUT);
  pinMode(RED3, OUTPUT);
  pinMode(LDR, INPUT);
  pinMode(RED4, OUTPUT);
  pinMode(Buzzer2, OUTPUT);
  Tsen.begin();
  Serial.begin(9600);
  
  }
  
  void loop()
  {
//FRONT DOOR :
    //TRIG
    digitalWrite(TRIG, LOW);
    delayMicroseconds(5); 
    digitalWrite(TRIG, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG, LOW);
    //ECHO
    int duration=pulseIn(ECHO, HIGH, 5000);
    //Serial.println("duration");
    int distance=duration*0.034/2;
    Serial.print("DISTANCE");
    Serial.println(distance);
    //comparison
    if(distance<=30)
    {
      digitalWrite(GREEN1, HIGH);
      digitalWrite(RED1, LOW);
      frontdoor.write(90);
    }
    else
    {
      digitalWrite(RED1, HIGH);
      digitalWrite(GREEN1, LOW);
      frontdoor.write(0);
      delay(1000);
    }
    
 //KITCHEN:
     int MQVALUE=analogRead(A5);
     if(MQVALUE>500)
   {
  digitalWrite(RED2,HIGH);
  digitalWrite(Buzzer1, HIGH);
   }
else
  {
  digitalWrite(RED2, LOW);
  digitalWrite(Buzzer1, LOW);
  }
  Serial.print("MQVALUE");
  Serial.println(MQVALUE);
   
// Hall
  
 int LDRVALUE=analogRead(A3);
  if(LDRVALUE>300)
  {
    digitalWrite(RED3, HIGH);
  }
  else
  {
    digitalWrite(RED3, LOW);
  }
  Serial.print("LDR VALUE");
  Serial.println(LDRVALUE);
  delay(1000);
    
  //BACKSIDE:
  float temp=Tsen.readTemperature();
  float Hum=Tsen.readHumidity();
  int Threshold=30;
  if(temp>Threshold)
  {
    digitalWrite(RED4, HIGH);
    digitalWrite(Buzzer2, HIGH);
    Serial.print("TEMPERATURE:");
    Serial.println(temp);
  }
  else
  {
    digitalWrite(RED4, LOW);
    digitalWrite(Buzzer2, LOW);
    Serial.print("HUMIDITY:");
    Serial.println(Hum);

  }
  }