from machine import Pin, Timer
import network
import time
from umqtt.robust import MQTTClient
import sys
import onewire
import ds18x20

# ============= CONFIGURACIÓN =============
TEMP_LIMIT = 30.0  # Límite de alarma

# DS18B20 en GPIO 15
ds_pin = Pin(15)
ds_sensor = ds18x20.DS18X20(onewire.OneWire(ds_pin))
roms = ds_sensor.scan()

# LED en GPIO 2 (activo en bajo)
led = Pin(2, Pin.OUT, value=1)

if not roms:
    sys.exit()

# ============= ADAFRUIT IO =============
ADAFRUIT_IO_URL = b'io.adafruit.com'
ADAFRUIT_USERNAME = 'yaircostac'
ADAFRUIT_IO_KEY = 'ae02a36881a647b6a5144a9baf1bd58b'
CLIENT_ID = b'ESP32_Client_' + ADAFRUIT_USERNAME.encode()

FEED_TEMP = f'{ADAFRUIT_USERNAME}/feeds/presion'.encode()
FEED_ALERT = f'{ADAFRUIT_USERNAME}/feeds/alerta'.encode()

# ============= WIFI =============
def connect_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        wlan.connect('Wokwi-GUEST', '')
        while not wlan.isconnected():
            time.sleep(1)

connect_wifi()

# ============= MQTT =============
def connect_mqtt():
    global client
    client = MQTTClient(
        client_id=CLIENT_ID,
        server=ADAFRUIT_IO_URL,
        user=ADAFRUIT_USERNAME,
        password=ADAFRUIT_IO_KEY,
        ssl=False
    )
    client.connect()

connect_mqtt()

# ============= LECTURA SENSOR =============
def read_sensor(timer):
    try:
        ds_sensor.convert_temp()
        time.sleep_ms(750)

        for rom in roms:
            temp = ds_sensor.read_temp(rom)

            # Publicar temperatura
            client.publish(FEED_TEMP, f"{temp:.2f}")

            # Control alarma (solo datos 1 o 0)
            if temp >= TEMP_LIMIT:
                led.value(0)  # Encender LED
                client.publish(FEED_ALERT, b"1")
            else:
                led.value(1)  # Apagar LED
                client.publish(FEED_ALERT, b"0")

    except:
        pass

# Cada 10 segundos
sensor_timer = Timer(0)
sensor_timer.init(period=10000, mode=Timer.PERIODIC, callback=read_sensor)

# ============= LOOP PRINCIPAL =============
while True:
    time.sleep(1)