#include <LiquidCrystal.h> 
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
// defines pins numbers
const int trigPin = 8;
const int echoPin = 10;
//const int buzzer= 9;
//const int led =13;

// defines variables
long duration;
int distance;
LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x3F for a 16 chars and 2 line display
void setup()
 {
Serial.begin(9600);
//pinMode(buzzer, OUTPUT);
pinMode (trigPin, OUTPUT); // Sets the trigpin as an Output
pinMode (echoPin, INPUT); // Sets the echopin as an Input
  lcd.init();
  lcd.clear();         
  lcd.backlight();      // Make sure backlight is on
}

void loop() {
// Clears the trigin
digitalWrite(trigPin, LOW);
delayMicroseconds (2);

// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds
duration= pulseIn (echoPin, HIGH);

// Calculating the distance
distance = duration*0.034/2;
//  if (distance <= 40)
//  {
 //   digitalWrite(buzzer,HIGH);
 //   digitalWrite(led,HIGH);
 // }
   //  else 
     //{
     //digitalWrite(buzzer,LOW);
     //digitalWrite(led,LOW);
    //}
// Prints the distance on the Serial Monitor
Serial.print("Distance(in cm): ");
Serial.println(distance);
delay(2000);
 lcd.clear();
 delay(100); 
  lcd.setCursor(1,0);   //Set cursor to character 2 on line 0
  lcd.print("Distance(in cm)");
  delay(500);
  lcd.setCursor(2,1);   //Move cursor to character 2 on line 1
  lcd.print(distance);
  delay(1000);  
}