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

# ---------------- BLYNK CONFIG ----------------
BLYNK_TEMPLATE_ID = "TMPL507o7o76h"
BLYNK_TEMPLATE_NAME = "iot industry"
BLYNK_AUTH_TOKEN = "Y36HVmT3CC-vPaVhEq36gL8Ew8xaNkuN"

# ---------------- WIFI CONFIG ----------------
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASSWORD = ""

# ---------------- CONNECT WIFI ----------------
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(WIFI_SSID, WIFI_PASSWORD)

print("Connecting to WiFi...", end="")

while not wifi.isconnected():
    print(".", end="")
    sleep(1)

print("\nWiFi Connected!")
print("IP Address:", wifi.ifconfig()[0])

# ---------------- SENSORS ----------------
sensor = dht.DHT22(Pin(26))
smoke_sensor = ADC(28)

# ---------------- LEDS ----------------
red = Pin(4, Pin.OUT)
green = Pin(2, Pin.OUT)
amber = Pin(3, Pin.OUT)

# ---------------- SEND DATA TO BLYNK ----------------
def send_to_blynk(pin, value):
    url = "https://blynk.cloud/external/api/update?token={}&{}={}".format(
        BLYNK_AUTH_TOKEN,
        pin,
        value
    )
    try:
        response = urequests.get(url)
        response.close()
        print("Sent to Blynk:", pin, value)
    except Exception as e:
        print("Failed to send data:", e)

# ---------------- MAIN LOOP ----------------
while True:

    try:
        # Read DHT22
        sensor.measure()
        temp = sensor.temperature()
        humidity = sensor.humidity()
    except Exception as e:
        print("DHT22 Error:", e)
        sleep(2)
        continue

    # Read gas sensor
    gas_value = smoke_sensor.read_u16()

    # Convert to voltage
    voltage = round((gas_value / 65535) * 3.3, 2)

    # Print values
    print("Temperature:", temp, "C")
    print("Humidity:", humidity, "%")
    print("Gas Value:", gas_value)
    print("Voltage:", voltage, "V")

    # Turn OFF all LEDs first
    red.off()
    green.off()
    amber.off()

    # ---------------- TEMPERATURE STATUS ----------------
    if temp < 30:
        green.on()
        print("Temperature Status: Normal")
    elif 30 <= temp <= 35:
        amber.on()
        print("Temperature Status: Warning")
    else:
        red.on()
        print("Temperature Status: Critical")

    # ---------------- GAS STATUS ----------------
    if gas_value > 30000:
        print("Gas Status: DANGER!")
    elif 15000 <= gas_value <= 30000:
        print("Gas Status: Warning!")
    else:
        print("Gas Status: Normal")

    print("-----------------------------")

    # ---------------- SEND VALUES TO BLYNK ----------------
    send_to_blynk("V0", temp)
    send_to_blynk("V1", humidity)
    send_to_blynk("V2", gas_value)
    send_to_blynk("V3", voltage)

    sleep(2)