#include <LiquidCrystal.h>

LiquidCrystal lcd(3,4,5,6,7,8);
const int echo = 10, trig = 9, ir = 11;

void setup() {
  // put your setup code here, to run once:
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  // pinMode(ir, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  // lcd.print("Hello");
    lcd.setCursor(0,0);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  float t, d;
  t = pulseIn(echo, HIGH);
  d = (t * 0.0343)/2;

  lcd.print("distance : "); 
  lcd.print(d);
  // int c = digitalRead(ir);
  // if (ir == 0) {
  //   lcd.setCursor(1,0);
  //     lcd.print("Object detected");
  // }
  // else {
  //   lcd.setCursor(1,0);
  //     lcd.print("no object detected");
  // }
}