#include <LiquidCrystal.h>
LiquidCrystal lcd(5,18,19,21,22,23);
const int trigP=2;
const int echoP=4;
long duration;
int distance; 
void setup() {
  pinMode(trigP, OUTPUT);
  pinMode(echoP, INPUT);
  Serial.begin(9600);
  lcd.begin(16,2);
}

void loop() {
  digitalWrite(trigP, LOW);
  delayMicroseconds(2);
  digitalWrite(trigP, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigP, LOW);
  duration=pulseIn(echoP,HIGH);
  distance=duration*0.034/2;
  lcd.setCursor(0,0);
  lcd.print(distance);
  Serial.print("Distance=");
  Serial.print(distance);
  lcd.setCursor(0,1);
  lcd.print("cm");
  Serial.println("cm");
  delay(500);
}