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

const char* ssid = "Wokwi-GUEST";
const char* password = ""; // Wokwi WiFi has no password
const char* mqttServer = "broker.hivemq.com";
int mqttPort = 1883;

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");

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

  Serial.println("\nConnected to WiFi!");

  client.setServer(mqttServer, mqttPort);

  while (!client.connected()) {
    Serial.print("Connecting to MQTT...");
    if (client.connect("esp32-client-gopal")) {
      Serial.println("connected");
      client.subscribe("gopal/topic");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      delay(2000);
    }
  }
}

void loop() {
  client.loop();
  client.publish("gopal/topic", "Hello from Wokwi ESP32!");
  delay(2000);
}