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

// Definisi pin dan jenis sensor
#define DHTPIN 2
#define DHTTYPE DHT22
#define TRIG_PIN 6  // Pin TRIG sensor ultrasonik
#define ECHO_PIN 7  // Pin ECHO sensor ultrasonik
#define SERVO_PIN 10
#define RED_PIN 3    // Pin warna merah pada RGB LED
#define GREEN_PIN 5  // Pin warna hijau pada RGB LED
#define BLUE_PIN 6   // Pin warna biru pada RGB LED
#define BUZZER_PIN 11  // Pin buzzer
#define BUTTON_PIN 12  // Pin tombol

// Inisialisasi objek
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2); // Inisialisasi LCD I2C
Servo servo;

const int ldrPin = A0;    // Pin sensor cahaya LDR
const int fanPin = 9;     // Pin kontrol kipas
const int ledPin = 8;     // Pin LED
const int relayPin = 4;   // Pin kontrol relay

bool buzzerActive = false; // Status buzzer

void setup() {
  Serial.begin(9600);
  pinMode(fanPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT); // Set buzzer pin as output
  pinMode(BUTTON_PIN, INPUT_PULLUP);   // Set button pin as input (not using pull-up resistor)

  dht.begin();
  lcd.init();
  lcd.backlight();
  servo.attach(SERVO_PIN);
}

void loop() {
  // Membaca data suhu dan kelembaban dari sensor DHT
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Membaca intensitas cahaya dari sensor LDR
  int lightIntensity = analogRead(ldrPin);

  // Membaca jarak dari sensor ultrasonik
  long duration, distance;
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  duration = pulseIn(ECHO_PIN, HIGH);
  distance = duration * 0.034 / 2;

  // Menampilkan data ke serial monitor
  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("Kelembaban: ");
  Serial.print(humidity);
  Serial.println(" %");

  Serial.print("Intensitas Cahaya: ");
  Serial.println(lightIntensity);

  Serial.print("Jarak: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Menampilkan data ke LCD
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(temperature);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Kelembaban: ");
  lcd.print(humidity);
  lcd.print("%");

  // Kontrol kipas berdasarkan suhu

  // Kontrol LED berdasarkan intensitas cahaya
  if (lightIntensity < 300) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }

  // Kontrol relay dan servo berdasarkan suhu
  if (distance > 30) {
    digitalWrite(relayPin, HIGH);  // Aktifkan relay
    Serial.println("Relay ON");
    servo.write(90); // Buka servo saat relay aktif
  } else {
    digitalWrite(relayPin, LOW);  // Nonaktifkan relay
    Serial.println("Relay OFF");
    servo.write(0); // Tutup servo saat relay mati
  }

  // Kontrol RGB LED berdasarkan kelembaban
  if (temperature < 20 ) {
    // Suhu sedang, biru
    analogWrite(RED_PIN, 0);
    analogWrite(GREEN_PIN, 0);
    analogWrite(BLUE_PIN, 255);
  } else if (temperature >= 20 && temperature < 40) {
    // Suhu rendah, merah
    analogWrite(RED_PIN, 255);
    analogWrite(GREEN_PIN, 0);
    analogWrite(BLUE_PIN, 0);
  } else {
    // Suhu tinggi, hijau
    analogWrite(RED_PIN, 0);
    analogWrite(GREEN_PIN, 255);
    analogWrite(BLUE_PIN, 0);

    // Aktifkan buzzer jika suhu di atas 40 derajat
    if (!buzzerActive) {
      tone(BUZZER_PIN, 1000); // Mainkan suara buzzer
      buzzerActive = true;
    }
  }

  // Matikan buzzer jika suhu turun di bawah 40 derajat
  if (temperature < 40 && buzzerActive) {
    noTone(BUZZER_PIN); // Matikan suara buzzer
    buzzerActive = false;
  }

  // Hentikan buzzer jika tombol ditekan
  if (digitalRead(BUTTON_PIN) == LOW) {
    noTone(BUZZER_PIN); // Matikan suara buzzer
    buzzerActive = false;
  }

  delay(2000); // Jeda 2 detik sebelum pengulangan berikutnya
}