//Mendeteksi jarak dengan sensor ultrasonik
//Program by Muhammad Abi Rafdi XI TEK 2

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

int trig = 18;
int echo = 5;
long durasi,jarak;
float suara = 0.034;

void setup() {
  layar.init();
  layar.backlight();
  layar.clear();
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  layar.setCursor(0, 0);
  layar.print("Project 4 XITEK2");
  layar.setCursor(0, 1);
  layar.print("   ULTRASONIC   ");
  delay(2000);
  layar.clear();
  layar.setCursor(0, 0);
  layar.print("Mendeteksi Jarak");
  layar.setCursor(6, 1);
  layar.print("...");
  delay(2000);
  layar.clear();
}

void loop() {
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  
  durasi = pulseIn(echo, HIGH);
  jarak = (durasi * suara)/2;
  
  layar.setCursor(0, 0);
  layar.print("Jarak:     ");
  layar.setCursor(7, 0);
  layar.print(jarak);
  layar.setCursor(10,0);
  layar.print(" cm");
  delay(300);
}