#include <LiquidCrystal.h>
#define TRIG_PIN 2
#define ECHO_PIN 3


// Inisialisasi pin LCD: RS, E, D4, D5, D6, D7
LiquidCrystal lcd(9,8,7,6,5,4);



void setup() {

    pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);


  // Inisialisasi LCD 16x2
  lcd.begin(20, 4);
  
  // Pindah ke baris kedua
  lcd.setCursor(4, 0);
  lcd.print("SENSOR JARAK");




}

void loop() {

  
  long durasi;
  int jarak_cm;


  // Mengirimkan sinyal puls trigger
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  // Membaca durasi sinyal puls echo
  durasi = pulseIn(ECHO_PIN, HIGH);

  // Menghitung jarak dalam centimeter
  jarak_cm = durasi * 0.034 / 2;

  // Menampilkan jarak ke lcd 
    lcd.setCursor(0, 1);
  lcd.print("Jarak: ");
    lcd.setCursor(7, 1);
  lcd.print(jarak_cm);
    lcd.setCursor(12, 1);
  lcd.println(" cm");

}