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("ESP32Juliano", SERVIDOR, 1883)
client.connect()

print("Conectado!")

# led setup
led = Pin(2, Pin.OUT)
LED_TOPICO = "com/LEDJuliano"

def blink_led(topic, msg):
    if msg.decode() == 'A':
        led.value(1)
    if msg.decode() == 'a':
        led.value(0)
        
# mqtt subscription
client.set_callback(blink_led)
client.subscribe(LED_TOPICO)
while True:
    client.check_msg()
    time.sleep(0.5)