#include <Arduino.h>
#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h>
#include <Adafruit_Sensor.h>
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "white-dev.aithings.vn";
const int mqtt_port = 1883;
const char* mqtt_topic = "sehaesp32/dht11";
#define DHTPIN 14
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
WiFiClient espClient;
PubSubClient client(espClient); // Create PubSubClient object
void setup_wifi() {
  Serial.print("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");
}

void reconnect_mqtt() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESP32Client")) {
      Serial.println("Connected to MQTT Broker");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" retrying in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  dht.begin();
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
}

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

  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  if (isnan(temp) && isnan(hum)) {
    String payload = "{\"temperature\":" + String(temp) + ",\"humidity\":" + String(hum) + "}";
    client.publish(mqtt_topic, payload.c_str());
    Serial.println("Published: " + payload);
  } else {
    Serial.println("Failed to read from DHT sensor!");
  }

  delay(5000); // Send data every 5 seconds
}