// NAMA: MUHAMMAD FA'IZ DWI ADHISKI
// KELAS: XI TEK 1

// =================

#define TRIG_PIN 4
#define ECHO_PIN 0

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

long durasi,jarak;
float suara = 0.034;

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.printstr("Faiz TEK 1");
  lcd.setCursor(0, 1);
  lcd.printstr("   Ultrasonic   ");
  delay(2000);

  lcd.clear();

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

void loop() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(5);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(5);
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(5);

  durasi = pulseIn(ECHO_PIN, HIGH);
  jarak = durasi * suara / 2;

  lcd.setCursor(0,0);
  lcd.printstr("Jaraknya adalah:");
  lcd.setCursor(0,1);
  lcd.print(++jarak);
  lcd.print(" cm   ");

  delay(100);
}