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

// Konfigurasi WiFi
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Konfigurasi MQTT
const char* mqtt_server = "broker.hivemq.com";
const int mqtt_port = 1883;
const char* mqtt_client_id = "clientId-2792F2ojct";

// Konfigurasi sensor DHT22
#define DHTPIN 4       // Pin data DHT22 terhubung ke pin GPIO4
#define DHTTYPE DHT22  // Tipe sensor DHT

DHT dht(DHTPIN, DHTTYPE);

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.print("WiFi connected - IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "clientId-6PkWF9VbNG";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("Connected");
      client.publish("/myskill/p/mqtt/subs", "tes");
      client.subscribe("/myskill/p/mqtt/subs");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 2 seconds");
      delay(2000);
    }
  }
}


void setup() {
  Serial.begin(115200);
  dht.begin();
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
}

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

  // Baca nilai suhu dan kelembaban
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Kirim data ke topik MQTT
  if (!isnan(temperature) && !isnan(humidity)) {
    char tempString[8];
    char humString[8];
    dtostrf(temperature, 5, 2, tempString);
    dtostrf(humidity, 5, 2, humString);

    String tempTopic = "home/living-room/temperature";
    String humTopic = "home/living-room/humidity";

    client.publish(tempTopic.c_str(), tempString);
    client.publish(humTopic.c_str(), humString);

    Serial.print("Suhu: ");
    Serial.print(temperature);
    Serial.print(" °C | Kelembaban: ");
    Serial.print(humidity);
    Serial.println(" %");
  } else {
    Serial.println("Gagal membaca sensor DHT22");
  }

  delay(5000); // Delay 5 detik sebelum membaca sensor lagi
}