#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h>
#include <ESP32Servo.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.emqx.io";
const char* mqtt_topic_temperature = "ssm3/temperature";
const char* mqtt_topic_humidity = "ssm3/humidity"; // Tambahkan topik untuk kelembapan
const char* mqtt_topic_servo = "ssm3/servo";

#define DHTPIN 27
#define DHTTYPE DHT22

WiFiClient espClient;
PubSubClient client(espClient);
DHT dht(DHTPIN, DHTTYPE);
Servo myservo;

const int ledPin = 26;
const int servoPin = 15; // GPIO pin yang terhubung ke servo

void setup_wifi() {
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  Serial.println("WiFi connected");
  Serial.println("IP address: " + WiFi.localIP().toString());
}

void callback(char* topic, byte* payload, unsigned int length) {
  String message = "";

  for (int i = 0; i < length; i++) {
    message += (char)payload[i];
  }

  Serial.print("Message received in topic '");
  Serial.print(topic);
  Serial.print("': ");
  Serial.println(message);

  if (strcmp(topic, mqtt_topic_temperature) == 0) {
    // Logika untuk mengontrol LED berdasarkan pesan MQTT
    if (message == "1") {
      digitalWrite(ledPin, HIGH);
    } else if (message == "0") {
      digitalWrite(ledPin, LOW);
    }
  } else if (strcmp(topic, mqtt_topic_servo) == 0) {
    // Logika untuk mengontrol motor servo berdasarkan pesan MQTT
    int servoPosition = message.toInt();
    if (servoPosition >= 0 && servoPosition <= 180) {
      myservo.write(servoPosition);
    }
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.println("Connecting to MQTT...");
    String clientId = "ESP32Client-" + String(random(0xffff), HEX);

    if (client.connect(clientId.c_str())) {
      Serial.println("Connected to MQTT");
      // Subsribe topik untuk menerima perintah
      client.subscribe(mqtt_topic_servo);
      client.subscribe(mqtt_topic_temperature);
      client.subscribe(mqtt_topic_humidity);
    } else {
      Serial.print("MQTT connection failed, rc=");
      Serial.print(client.state());
      Serial.println(" Retry in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  dht.begin();
  myservo.attach(servoPin);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity(); // Baca kelembapan

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  String temperatureMessage = String(temperature, 2);
  client.publish(mqtt_topic_temperature, temperatureMessage.c_str());

  String humidityMessage = String(humidity, 2); // Kirim data kelembapan melalui MQTT
  client.publish(mqtt_topic_humidity, humidityMessage.c_str());

  // Kontrol LED dan servo berdasarkan suhu dan kelembapan
  if (temperature > 30.0 || humidity > 60.0) {
    digitalWrite(ledPin, HIGH);
    myservo.write(90); // Contoh posisi servo tengah
  } else {
    digitalWrite(ledPin, LOW);
    myservo.write(0); // Contoh posisi servo minimum
  }

  delay(10000);
}