import network 
import time 
from machine import Pin 
from umqtt.simple import MQTTClient 
# MQTT SERVER 
SERVIDOR = "broker.hivemq.com" 
print("Conectando-se ao WiFi", end="") 
sta_if = network.WLAN(network.STA_IF) 
sta_if.active(True) 
sta_if.connect('Wokwi-GUEST', '')
while not sta_if.isconnected(): 
    print(".", end="") 
    time.sleep(0.1) 
print(" Conectado!") 
print("Conectando-se ao servidor MQTT... ", end="") 
client = MQTTClient("ESP32Fulano", SERVIDOR, 1883)
client.connect() 
print("Conectado!") 
# led setup
led = Pin(2, Pin.OUT) 
LED_TOPICO = "LigaLedJ"
def blink_led(topic, msg): 
    if msg.decode() == '1': 
        led.value(1) 
    if msg.decode() == '2': 
        led.value(0) 
# mqtt subscription 
client.set_callback(blink_led) 
client.subscribe(LED_TOPICO) 
while True: 
    client.check_msg() 
    time.sleep(0.5)