#include <LiquidCrystal.h>
#include<Servo.h>
Servo myservo;
const int rs=12,en=11,d4=5,d5=4,d6=3,d7=2;
LiquidCrystal lcd(rs,en,d4,d5,d6,d7);
int trigPin=8;
int echoPin=9;
long duration;
int distance[5];
int avg;
int sw=7;
int buzzer=13;
int k=0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.begin(16,2);
  pinMode(trigPin , OUTPUT);
  pinMode(echoPin , INPUT);
  pinMode(sw , INPUT);
  pinMode(buzzer , OUTPUT);
  myservo.attach(6);
}
void loop() {
  // put your main code here, to run repeatedly:
  lcd.clear();
  for(int i=0;i<5;i++){
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin , HIGH);
  distance[i] = duration * 0.034/2;
  }
  avg=(distance[0]+distance[1]+distance[2]+distance[3]+distance[4])/5;
  if(digitalRead(sw)==0){
 if(avg<50){
    myservo.write(90);
    lcd.setCursor(0,0);
    lcd.print("DUSTBIN OPENED..");
    
    if(k==0){
      digitalWrite(buzzer , HIGH);
      k=1;
      tone(13,100);
     delay(100);
     digitalWrite(buzzer , LOW);
     noTone(13);
    }
  }
  else{
    k=0;
    myservo.write(0);
    lcd.setCursor(0,0);
    lcd.print("DUSTBIN CLOSED..");
    digitalWrite(buzzer , LOW);
    noTone(13);
  }
  }
  else{
    myservo.write(0);
    lcd.setCursor(0,0);
    lcd.print("DUSTBIN IS FULL..");
    lcd.setCursor(0,1);
    lcd.print("DUSTBIN CLOSED..");
    digitalWrite(buzzer , HIGH);
    tone(13, 1000);
  }
  delay(1500);
}