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

char clientID[50];
WiFiClient espClient;
PubSubClient client(espClient);

const int DHT_PIN = 15;
static char strHumidity[10];

DHTesp dhtSensor;

void setup() {

  WiFi.mode(WIFI_STA);

  WiFi.begin("your_wifi_ssid", "your_wifi_password");

  client.setServer("your_mqtt_server_address", 1883);

  Serial.begin(9600);

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

float getHumidity() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  return data.humidity;
}

void mqttReconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection…");
    if (client.connect(clientID)) {
      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()) {
    mqttReconnect();
  }
  client.loop();

  float humidity = getHumidity();
  sprintf(strHumidity, "%.2f", humidity);
  client.publish("topicName/humidity", strHumidity);
  delay(1000);
}