import network
import time
from machine import Pin
from umqtt.simple import MQTTClient

# WiFi
ssid = "Wokwi-GUEST"
password = ""

# MQTT
mqtt_server = "broker.emqx.io"
topic_led = b"esp32/led"

# LED
pin_led = Pin(15, Pin.OUT)

# Connexion WiFi
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(ssid, password)

print("Connexion WiFi...")
while not wifi.isconnected():
    time.sleep(0.2)

print("WiFi connecté")

# Callback MQTT
def callback(topic, msg):
    print("Message reçu :", topic, msg)

    if topic == topic_led:
        if msg == b"ON":
            pin_led.on()
        elif msg == b"OFF":
            pin_led.off()

# Connexion MQTT
client = MQTTClient("esp32_led", mqtt_server)
client.set_callback(callback)
client.connect()
client.subscribe(topic_led)

print("MQTT connecté")
print("Abonné à esp32/led")

while True:
    client.check_msg()
    time.sleep(0.1)