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

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

const int LDR_PIN = A0;  // Pin analog untuk sensor LDR
const int BUZZER_PIN = 9;  // Pin untuk buzzer
const int LED_PIN = 13;  // Pin untuk LED

void setup() {
  lcd.begin(16, 2);  // Inisialisasi LCD
  lcd.backlight();

  pinMode(LDR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(LDR_PIN);

  // Mendeteksi warna berdasarkan nilai sensor LDR
  if (sensorValue < 30) {
    displayColor("merah");
    digitalWrite(LED_PIN, HIGH);
    noTone(BUZZER_PIN);
  } else if (sensorValue >= 300 && sensorValue < 600) {
    displayColor("Hijau");
    digitalWrite(LED_PIN, HIGH);
    noTone(BUZZER_PIN);
  } else if (sensorValue >= 600 && sensorValue < 800) {
    displayColor("Kuning");
    digitalWrite(LED_PIN, HIGH);
    noTone(BUZZER_PIN);
  } else {
    displayColor("Biru");
    digitalWrite(LED_PIN, LOW);
    tone(BUZZER_PIN, 1000);  // Mengaktifkan buzzer jika warna biru terdeteksi
  }

  delay(1000);  // Mengatur waktu delay untuk stabilisasi pembacaan
}

void displayColor(String color) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Warna: ");
  lcd.print(color);
}