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

#define DHTPIN 2          // Digital pin connected to the DHT sensor
#define DHTTYPE DHT11     // DHT 11

const char* ssid = "aNlas6ao4GVzhJwSDZDn";
const char* password = "YOUR_WIFI_PASSWORD";
const char* mqttServer = "YOUR_THINGSBOARD_HOST"; // Example: "demo.thingsboard.io"
const int mqttPort = 1883;
const char* mqttUsername = "YOUR_MQTT_USERNAME";   // Or an empty string if not required
const char* mqttPassword = "YOUR_MQTT_PASSWORD";   // Or an empty string if not required

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

void setup() {
  Serial.begin(115200);
  delay(10);
  
  dht.begin();
  setup_wifi();
  client.setServer(mqttServer, mqttPort);
}

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 reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ArduinoClient", mqttUsername, mqttPassword)) {
      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();

  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

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

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

  String temperatureString = String(temperature);
  String humidityString = String(humidity);

  // Publish data to ThingsBoard
  String data = "{\"temperature\":" + temperatureString + ",\"humidity\":" + humidityString + "}";
  char attributes[100];
  data.toCharArray(attributes, 100);
  client.publish("v1/devices/me/telemetry", attributes);
  delay(2000); // Adjust delay time according to your needs
}