#------------------------------ [IMPORT]------------------------------------
import machine
from machine import Pin
import network
from umqtt.simple import MQTTClient
import dht
import time # tiempo

#--------------------------- [OBJETOS]---------------------------------------
led = machine.Pin(2, machine.Pin.OUT)
sensor = dht.DHT22(Pin(15))

#----------------------[ CONECTAR WIFI ]---------------------------------------------------------#
def conectaWifi(red, password):
    global miRed
    miRed = network.WLAN(network.STA_IF)
    if not miRed.isconnected():  # Si no está conectado…
        miRed.active(True)  # Activa la interface
        miRed.connect(red, password)  # Intenta conectar con la red
        print('Conectando a la red', red + "…")
        timeout = time.time()
        while not miRed.isconnected():  # Mientras no se conecte..
            if (time.ticks_diff(time.time(), timeout) > 10):
                return False
    return True

#------------------------------------[CONFIGURACIÓN MQTT]----------------------------------------#
MQTT_CLIENT_ID = "Bx42EQ4bDjgZGR0VLC06Czo"  # Reemplaza con el ID de cliente MQTT
MQTT_USERNAME = "Bx42EQ4bDjgZGR0VLC06Czo"  # Reemplaza con el nombre de usuario MQTT
MQTT_PASSWORD = "OY8ScLTwEBaB60gJ0e/2SreD"  # Reemplaza con la contraseña MQTT
MQTT_SERVER = "mqtt3.thingspeak.com"
MQTT_PORT = 1883
MQTT_TOPIC = "channels/3270600/publish" #reemplazar numero del canal
UPDATE_TIME_INTERVAL = 5000  # en ms

#------------------------------------[BOT]---------------------------------------------------------------------#
if conectaWifi("Wokwi-GUEST", ""):
    print("Conexión exitosa!")
    print('Datos de la red (IP/netmask/gw/DNS):', miRed.ifconfig())
    print("Connecting to MQTT server... ", end="")

client = MQTTClient(MQTT_CLIENT_ID, MQTT_SERVER, port=MQTT_PORT, user=MQTT_USERNAME, password=MQTT_PASSWORD, keepalive=60)

try:
    client.connect(clean_session=True)
    print("Connected!")
except Exception as e:
    print("Failed to connect to MQTT server:", e)

# **************************************#
last_update = time.ticks_ms()

while True:
    if time.ticks_ms() - last_update >= UPDATE_TIME_INTERVAL:
        sensor.measure()
        Temperatura = sensor.temperature()
        Humedad = sensor.humidity()

        payload = f"field1={Temperatura}&field2={Humedad}&status=MQTTPUBLISH"
        
        try:
            if not client.connect(clean_session=False):
                print("Reconnected to MQTT server")
            client.publish(MQTT_TOPIC, payload)
            client.disconnect()
            print("Published payload:", payload)
        except Exception as e:
            print("Failed to publish to MQTT server:", e)

        led.value(not led.value())
        last_update = time.ticks_ms()