#include <DHTesp.h>
#include <WiFi.h>
#include <ThingsBoard.h>
#include <Arduino_MQTT_Client.h>
#define pinDht 15
DHTesp dhtSensor;

#define WIFI_AP "Wokwi-GUEST"
#define WIFI_PASS ""

#define TB_SERVER "Thingsboard.cloud"
#define TOKEN "AASfVydoI1lUNO4cJcRV"

constexpr uint16_t MAX_MESSAGE_SIZE = 128U;

WiFiClient espClient;
Arduino_MQTT_Client mqttClient(espClient);
ThingsBoard tb(mqttClient, MAX_MESSAGE_SIZE);

void connectToWiFi()
{
  Serial.println("Connecting to WiFi...");
  int attempts = 0;

  while (WiFi.status() != WL_CONNECTED && attempts < 20) 
  {
    WiFi.begin(WIFI_AP, WIFI_PASS, 6);
    delay(500);
    Serial.println(",");
    attempts++;
  }

  if (WiFi.status() != WL_CONNECTED)
  {
    Serial.println("\nFailed to connect to WiFi.");
  }
  else 
  {
    Serial.println("\nConnected to WiFi");
  }
}

void connectToThingsBoard() 
{
  if (!tb.connected()) 
  {
    Serial.println("Connecting to ThingsBoard server");

    if (!tb.connect(TB_SERVER, TOKEN)) 
{
      Serial.println("Failed to connect to ThingsBoard");
    }
    else 
    {
      Serial.println("Connected to ThingsBoard");
    }
  }
}

void sendDataToThingsBoard(float temp, float hum) 
{
  String jsonData = "{\"temperature\":" + String(temp) + ", \"humidity\":" + String(hum) + "}";
  tb.sendTelemetryJson(jsonData.c_str());
  Serial.println("Data sent");
}

void setup() 
{
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
dhtSensor.setup(pinDht, DHTesp::DHT22);
  connectToWiFi();
}

void loop() 
{
  // put your main code here, to run repeatedly:
  connectToWiFi();

  TempAndHumidity data =dhtSensor.getTempAndHumidity();
  float temp = data.temperature;
  float hum = data.humidity;

  Serial.println(temp);
  Serial.println(hum);

  if (!tb.connected()) 
  {
    connectToThingsBoard();
  }

  sendDataToThingsBoard(temp, hum);

  delay(3000); // this speeds up the simulation

  tb.loop();}

  https://thingsboard.cloud/dashboards/all