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

# --- CONFIGURACIÓN MQTT ---
MQTT_CLIENT_ID = "micropython-weather-demo"
MQTT_BROKER    = "test.mosquitto.org"  # Broker público alternativo
MQTT_PORT      = 8080                   # WebSocket port
MQTT_TOPIC     = "wokwi-weather"

sensor = dht.DHT22(Pin(15))

# --- CONEXIÓN WI-FI ---
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect('Wokwi-GUEST', '')
while not sta_if.isconnected():
    time.sleep(0.1)
print("Connected to WiFi!")

# --- CONEXIÓN MQTT ---
client = MQTTClient(MQTT_CLIENT_ID, MQTT_BROKER, port=MQTT_PORT)
client.connect()
print("Connected to MQTT broker!")

prev_weather = ""
while True:
    sensor.measure()
    message = ujson.dumps({
        "temp": sensor.temperature(),
        "humidity": sensor.humidity()
    })
    if message != prev_weather:
        client.publish(MQTT_TOPIC, message)
        prev_weather = message
    time.sleep(1)