from machine import Pin
from time import sleep
import network
import dht
import urequests
import time

WIFI_SSID = "Wokwi-GUEST"
WIFI_PASSWORD = ""

BLYNK_TOKEN = "WBRAXIVGPVfKjzlL55OFiQvASnNfyjdM"
BLYNK_URL = "https://blynk.cloud/external/api"

THINGSPEAK_KEY = "YOIFM1E9CBZPQN0U"
THINGSPEAK_URL = "http://api.thingspeak.com/update"

sensor = dht.DHT22(Pin(15))
led = Pin(4, Pin.OUT)
ledamarillo = Pin(16, Pin.OUT)
ledrojo = Pin(17, Pin.OUT)

pin_sensor = Pin(21, Pin.IN)






def conectar_wifi():
    wifi = network.WLAN(network.STA_IF)
    wifi.active(True)
    wifi.connect(WIFI_SSID, WIFI_PASSWORD)

    print("Conectando a WiFi", end="")
    while not wifi.isconnected():
        print(".", end="")
        sleep(0.5)

    print("\nWiFi conectado:", wifi.ifconfig()[0])


def blynk_update(**datos):
    params = "&".join([pin + "=" + str(valor) for pin, valor in datos.items()])
    url = BLYNK_URL + "/update?token=" + BLYNK_TOKEN + "&" + params
    try:
        r = urequests.get(url)
        r.close()
    except Exception as e:
        print("Error enviando a Blynk:", e)


def blynk_get(pin):
    url = BLYNK_URL + "/get?token=" + BLYNK_TOKEN + "&" + pin
    try:
        r = urequests.get(url)
        valor = int(r.text)
        r.close()
        return valor
    except Exception as e:
        print("Error leyendo Blynk:", e)
        return 0


def enviar_thingspeak(temperatura, humedad):
    url = THINGSPEAK_URL + "?api_key=" + THINGSPEAK_KEY
    url += "&field1=" + str(temperatura)
    url += "&field2=" + str(humedad)
    try:
        r = urequests.get(url)
        print("ThingSpeak respuesta:", r.text)
        r.close()
    except Exception as e:
        print("Error enviando a ThingSpeak:", e)


conectar_wifi()

while True:
    try:
        sensor.measure()
        temperatura = sensor.temperature()
        humedad = sensor.humidity()
        estado_sensor = pin_sensor.value()

        estado_led = blynk_get("V0")
        led.value(estado_led)

        blynk_update(V1=temperatura, V2=humedad)
        enviar_thingspeak(temperatura, humedad)

        if temperatura < 15:
            led.on()
        else:
            led.off()
        if humedad < 30:
            ledamarillo.on()
        else:
            ledamarillo.off()
        # Lógica inversa: 0 significa que detecta gas/humo
        if estado_sensor == 0:
            print("¡Alerta! Humo o gas detectado")
            led.value(1) # Encendemos el LED
        else:
            print("Ambiente seguro")
            led.value(0) # Apagamos el LED
            
        # Enviamos los datos a Blynk en el pin virtual V3
        blynk_update(V3=estado_sensor)
        
            
        # Esperamos medio segundo antes de la siguiente lectura
        time.sleep(0.5)

        print("Temperatura:", temperatura, "°C")
        print("Humedad:", humedad, "%")
        print("LED:", estado_led)
        print("--------------------------------")

        
                
    except OSError:
        print("Error al leer el DHT22")

    sleep(15)