#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int trigPin = 6;
const int echoPin = 7;
int Buzzer = 8;

long duration;
int Cm, Inch;

void setup(){
  lcd.begin(12, 2);

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(115200);
}

void loop(){
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);
  Cm = duration * 0.034/2;
  Inch = duration * 0.0133/2;

  lcd.setCursor(0,0);
  lcd.print("Buzzer: ");
  lcd.print(" cm ");
  delay(10);
  lcd.setCursor(0,1);
  lcd.print("Buzzer: ");
  lcd.print(Inch);
  lcd.print(" Inch ");
  delay(10);

  if (Cm <= 10){
    tone(Buzzer, 1030);
    delay(400);
    noTone(8);
    delay(100);
  }

}