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

WiFiClient espClient;
PubSubClient client(espClient);

void setup()
{
  WiFi.mode(WIFI_STA);
  WiFi.begin("Wokwi-GUEST", "");
  
  client.setServer("broker.emqx.io", 1883);
  Serial.begin(9600);

}

void loop() 
{
  
  client.connect("clientId-123");
  Serial.println("ESP32 is Connected with MQTT!");
  
  client.publish("testtopic/iot","I'm coder");

}