#include <WiFi.h>
#include <PubSubClient.h>
#include <DHTesp.h>
#include <ArduinoJson.h>

const int DHT_PIN = 15;
DHTesp dhtSensor;

const char* ssid = "Wokwi-GUEST";
const char* mqtt_server = "broker.hivemq.com";
const char* mqtt_topic = "VLUTE/DHT2232";

WiFiClient espClient;
PubSubClient client(espClient);

void WIFIConnect() {
  WiFi.begin(ssid, "");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
}

void MQTTReconnect() {
  while (!client.connected()) {
    if (client.connect("ESP32Client")) {
      client.subscribe(mqtt_topic);
    } else {
      delay(5000);
    }
  }
}

void callback(char* topic, byte* message, unsigned int length) {
  // Message arrived
}

void setup() {
  Serial.begin(115200);
  WIFIConnect();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

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

  TempAndHumidity data = dhtSensor.getTempAndHumidity();

  StaticJsonDocument<200> doc;
  doc["temperature"] = data.temperature;
  doc["humidity"] = data.humidity;

  char jsonBuffer[200];
  serializeJson(doc, jsonBuffer);

  client.publish(mqtt_topic, jsonBuffer);
  
  delay(2000);  // Publish interval
}