//PTS EMBEDDED SYSTEM ULTRASONIC - KODE 02S1
//By Azzahid Tawarra L.P XI TEK 1

#include <LiquidCrystal_I2C.h>
const int TRIG_PIN = 19;
const int ECHO_PIN = 18;
LiquidCrystal_I2C lcd(0x27, 16, 2);
long durasi;
float jarakCm;

void setup() {
  Serial.begin(115200);
 
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("PTS EMBEDDED SYSTEM");
  lcd.setCursor(0,1);
  lcd.print("AZZAHID XI TEK 1 ");
  delay(2000);
  lcd.clear();
}

void loop() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  durasi = pulseIn(ECHO_PIN, HIGH);
  
  jarakCm = durasi * 0.0343 / 2;
  
  Serial.print("Jarak: ");
  Serial.print(jarakCm);
  Serial.println(" cm");
  
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("Jarak: ");
  lcd.print(jarakCm);
  lcd.print(" cm");
  
  lcd.setCursor(0, 1);
  if (jarakCm < 10) {
    lcd.print("ADA BENDA");
  } else {
    lcd.print("TIDAK ADA BENDA");
  }
  
  delay(500);
}