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

DHT dht(4, DHT22);
WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(115200);
  dht.begin();
  WiFi.begin("Wokwi-GUEST", "");
  
  while (WiFi.status() != WL_CONNECTED) delay(500);
  
  client.setServer("test.mosquitto.org", 1883);
}

void loop() {
  if (!client.connected()) client.connect("ESP32-DHT-Client");
  client.loop();

  float t = dht.readTemperature(), h = dht.readHumidity();

  if (!isnan(t) && !isnan(h)) {
    String payload = "Temp=" + String(t, 1) + "C, Hum=" + String(h, 1) + "%";
    client.publish("esp32/2300030042/dht22sensorreadings", payload.c_str());
    Serial.println(payload);
  }
  
  delay(3000);
}