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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* broker = "broker.hivemq.com";
const char* topic = "esp32/dectus";

WiFiClient wifeClient;
PubSubClient psbClient(wifeClient);

void callback(char* topic, byte* load, uint16_t length) {
  Serial.print("Received: ");
  Serial.println(topic);
  String msg = "";
  for (int i = 0; i < length; i++) {
    msg += (char)load[i];
  }
  Serial.print("Msg: ");
  Serial.println(msg);
}

void setup() {
  Serial.begin(115200);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("Connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());


  psbClient.setServer(broker, 1883);
  psbClient.setCallback(callback);
  while (!psbClient.connected()) {
    Serial.print("-");
    if (psbClient.connect("ESP32-NewClient")) {
      Serial.println("Successfully connected to MQTT Broker!");
      psbClient.subscribe(topic);
    } else {
      delay(100);
    }
  }
}

void loop() {
  psbClient.loop();
}