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

LiquidCrystal_I2C lcd(0x27, 16, 2);

// กำหนดขาอุปกรณ์
#define LED_PIN 2
#define SW_PIN 4

bool ledState = false;
bool lastButtonState = HIGH;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(SW_PIN, INPUT_PULLUP);

  lcd.init();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("Smart Room");

  delay(2000);
  lcd.clear();
}

void loop() {
  bool buttonState = digitalRead(SW_PIN);

  if (buttonState == LOW && lastButtonState == HIGH) {
    ledState = !ledState;
    digitalWrite(LED_PIN, ledState);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Status:");

    lcd.setCursor(0, 1);
    if (ledState) {
      lcd.print("LED ON ");
    } else {
      lcd.print("LED OFF");
    }
    delay(200); 
  }
  lastButtonState = buttonState;
}