#include <Wire.h>
#include <LiquidCrystal_I2C.h>
int trig = 12;
int echo = 11;
LiquidCrystal_I2C lcd(0x27,16,2);
void setup ()
{
lcd.init();
lcd.backlight();
lcd.home();
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
}
void loop()
{
unsigned long duration;
int distance;
digitalWrite(trig, 1);
delayMicroseconds(5);
digitalWrite(trig, 0);
duration = pulseIn(echo, HIGH);
distance = int(duration / 58);
lcd.setCursor(2,0);
lcd.print(distance);
lcd.print("cm ");
}