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

#define LED_PIN 15
#define RELAY_PIN 4
#define BUZZER_PIN 16
#define SERVO_PIN 17
#define LDR_PIN 34
#define TRIG_PIN 12
#define ECHO_PIN 14
#define DHT_PIN 5
#define DHT_TYPE DHT22

DHT dht(DHT_PIN, DHT_TYPE);
Servo myServo;

void setup() {
  Serial.begin(115200);
  
  pinMode(LED_PIN, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LDR_PIN, INPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  
  dht.begin();
  myServo.attach(SERVO_PIN);

  Serial.println("System initialized");
}

void loop() {
  // Mengukur cahaya menggunakan LDR
  int ldrValue = analogRead(LDR_PIN);
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);
  
  if (ldrValue < 1000) {
    digitalWrite(LED_PIN, HIGH); // Hidupkan LED jika gelap
  } else {
    digitalWrite(LED_PIN, LOW); // Matikan LED jika terang
  }

  // Mengukur suhu dan kelembaban menggunakan DHT22
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C, Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  if (temperature > 30) {
    digitalWrite(RELAY_PIN, HIGH); // Aktifkan relay jika suhu di atas 30°C
  } else {
    digitalWrite(RELAY_PIN, LOW); // Matikan relay jika suhu di bawah 30°C
  }

  // Mengukur jarak menggunakan 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;

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

  if (distance < 10) {
    digitalWrite(BUZZER_PIN, HIGH); // Aktifkan buzzer jika jarak kurang dari 10 cm
    myServo.write(90); // Pindahkan servo ke posisi 90 derajat
  } else {
    digitalWrite(BUZZER_PIN, LOW); // Matikan buzzer jika jarak lebih dari 10 cm
    myServo.write(0); // Kembalikan servo ke posisi awal
  }

  delay(1000); // Tunda 1 detik sebelum looping ulang
}