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

#define DHTPIN 15 // Pin yang digunakan untuk sensor DHT22
#define DHTTYPE DHT22
#define LDRPIN 34 // Pin yang digunakan untuk sensor LDR

const char* ssid = "Wokwi-GUEST"; // Ganti dengan SSID Wi-Fi Anda
const char* password = ""; // Ganti dengan password Wi-Fi Anda
const char* mqtt_server = "thingsboard.cloud";
const char* access_token = "9opbRpJma8IrsnMuGqXJ"; // Ganti dengan token akses Thingsboard Anda

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

void setup() {
  Serial.begin(115200);
  dht.begin();
  
  // Menghubungkan ke Wi-Fi
  setup_wifi();
  
  // Menghubungkan ke Thingsboard
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  
  // Konfigurasi pin LDR sebagai input
  pinMode(LDRPIN, INPUT);
}

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

void callback(char* topic, byte* payload, unsigned int length) {
  // Handle callback here if needed
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    
    if (client.connect("ESP32Client", access_token, "")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

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

  // Membaca data dari sensor DHT22
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Membaca data dari sensor LDR
  int ldrValue = analogRead(LDRPIN);
  
  // Mempersiapkan payload untuk Thingsboard
  String payload = "{";
  payload += "\"temperature\":"; payload += t; payload += ",";
  payload += "\"humidity\":"; payload += h; payload += ",";
  payload += "\"light\":"; payload += ldrValue;
  payload += "}";
  
  // Mengirim data ke Thingsboard
  client.publish("v1/devices/me/telemetry", (char*) payload.c_str());
  
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" °C ");
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" % ");
  Serial.print("Light Level: ");
  Serial.println(ldrValue);

  delay(2000); // Tunggu 2 detik sebelum membaca data kembali
}