#include <LiquidCrystal_I2C.h> 
#define echoPin 2 
#define trigPin 3 

LiquidCrystal_I2C lcd(0x27,16,2);

long duration; 
int distance; 

void setup() {
  lcd.init();
  lcd.clear();        
  lcd.backlight();
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 

}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;
  lcd.setCursor(0,0);
  lcd.print(String(distance)+ "cm");
  lcd.setCursor(0,1);
  lcd.print(String(distance /2.54)+ "inch");
  delay(1000);
  lcd.clear();


}