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

# MQTT Server Parameters
MQTT_CLIENT_ID = "micropython-weather-demo"
MQTT_BROKER    = "broker.mqttdashboard.com"
MQTT_USER      = ""
MQTT_PASSWORD  = ""
MQTT_TOPIC     = "wokwi-weather"

# Configuración del sensor DHT22
sensor = dht.DHT22(Pin(15))

# Configuración de los LEDs
led_rojo = Pin(12, Pin.OUT)
led_amarillo = Pin(13, Pin.OUT)
led_verde = Pin(14, Pin.OUT)

print("Connecting to 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(" Connected!")

print("Connecting to MQTT server... ", end="")
client = MQTTClient(MQTT_CLIENT_ID, MQTT_BROKER, user=MQTT_USER, password=MQTT_PASSWORD)
client.connect()

print("Connected!")

prev_weather = ""
while True:
  print("Measuring weather conditions... ", end="")
  sensor.measure()
  temperature = sensor.temperature()
  humidity = sensor.humidity()
  
  # Encender LEDs según la temperatura
  if temperature <= 24:
    led_amarillo.on()
    led_rojo.off()
    led_verde.off()
  elif temperature >= 26:
    led_rojo.on()
    led_amarillo.off()
    led_verde.off()
  else:
    led_verde.on()
    led_amarillo.off()
    led_rojo.off()
  
  message = ujson.dumps({
    "temp": temperature,
    "humidity": humidity,
  })
  
  if message != prev_weather:
    print("Updated!")
    print("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC, message))
    client.publish(MQTT_TOPIC, message)
    prev_weather = message
  else:
    print("No change")
  
  time.sleep(1)