#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd  (0x27,16,2);
int trig=12;
int echo=11;
long sure;
int mesafe;
void setup() {
lcd.begin();
pinMode(trig,OUTPUT);
pinMode(echo,INPUT);
}

void loop() {
digitalWrite(trig,LOW);
delayMicroseconds(10);
digitalWrite(trig,HIGH);
delayMicroseconds(10);
digitalWrite(trig,LOW);
sure=pulseInLong(echo,1);
mesafe=(0.0343*sure)/2;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(mesafe);
delay(1000);
}