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

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

// Konfigurasi MQTT
const char* mqtt_server = "thingsboard.cloud";
const char* mqtt_username = "13122001"; // Ganti dengan access token ThingsBoard
const char* mqtt_topic = "v1/devices/me/telemetry";

// Konfigurasi sensor DHT22
#define DHTPIN 15  // Pin data sensor DHT22 terhubung ke pin 4 pada ESP32
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(115200);

  // Menghubungkan ke WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    Serial.print(".");
  }
  Serial.println();
  Serial.println("WiFi terhubung");

  // Mengatur server MQTT
  client.setServer(mqtt_server, 1883);
}

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

  // Membaca suhu dan kelembaban dari sensor DHT22
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Mengirim data ke ThingsBoard melalui MQTT
  if (!isnan(humidity) && !isnan(temperature)) {
    String payload = "{\"temperature\":" + String(temperature) + ",\"humidity\":" + String(humidity) + "}";
    client.publish(mqtt_topic, payload.c_str());
    Serial.println("Data terkirim ke ThingsBoard: " + payload);
  } else {
    Serial.println("Gagal membaca data dari sensor DHT22");
  }

  delay(5000);  // Menunggu 5 detik sebelum mengirim data lagi
}

void reconnect() {
  // Loop sampai terhubung ke server MQTT
  while (!client.connected()) {
    Serial.print("Mencoba terhubung ke MQTT server...");
    if (client.connect("ESP32Client", mqtt_username, "")) {
      Serial.println("Terhubung");
    } else {
      Serial.print("Gagal, rc=");
      Serial.print(client.state());
      Serial.println(" Coba lagi dalam 5 detik");
      delay(5000);
    }
  }
}