#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C LCD bisa 0x27 atau 0x3F

int pirPin = 2;  // Sensor PIR di pin digital 2
int pirState = LOW;
int lastPirState = LOW;

void setup()
{
  Serial.begin(9600);
  pinMode(pirPin, INPUT);
  
  lcd.init();       
  lcd.backlight();  

  lcd.setCursor(0, 0);
  lcd.print("  PIR SENSOR  ");
  lcd.setCursor(0, 1);
  lcd.print("   Loading...  ");
  delay(2000);
  lcd.clear();
  
  lcd.setCursor(0, 0);
  lcd.print("Status: Tidak ");
  lcd.setCursor(0, 1);
  lcd.print("Gerakan  ");
}

void loop()
{
  pirState = digitalRead(pirPin);

  if (pirState == HIGH && lastPirState == LOW)
  {
    Serial.println("Gerakan terdeteksi!");
    
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Status: Terdeteksi ");
    lcd.setCursor(0, 1);
    lcd.print("Waktu: ");
    lcd.print(millis() / 1000); // Menampilkan waktu dalam detik
    lcd.print("s");
  }
  else if (pirState == LOW && lastPirState == HIGH)
  {
    Serial.println("Tidak ada gerakan.");

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Status: Tidak ");
    lcd.setCursor(0, 1);
    lcd.print("Gerakan  ");
  }

  lastPirState = pirState; 
  delay(50); 
}