# COMPLETE HOME AUTOMATION WITH SERVO FAN
# Raspberry Pi Pico W + MicroPython + Wokwi

import network
import time
import urequests
import ujson
from machine import Pin, PWM
import dht

# ---------------- WIFI ----------------
SSID = "Wokwi-GUEST"
PASSWORD = ""

# ---------------- ADAFRUIT IO ----------------
AIO_USERNAME = "lokesh_naik128"
AIO_KEY = "aio_XACY73nPzMpJSjcG6ZfFFELVKzV0"
FEED_NAME = "light"

AIO_URL = "https://io.adafruit.com/api/v2/{}/feeds/{}/data/last".format(
    AIO_USERNAME, FEED_NAME
)

HEADERS = {
    "X-AIO-Key": AIO_KEY,
    "User-Agent": "MicroPython",
    "Accept": "application/json"
}

# ---------------- PIN SETUP ----------------
light = Pin(15, Pin.OUT)
button = Pin(16, Pin.IN, Pin.PULL_DOWN)
sensor = dht.DHT22(Pin(13))

# Servo (Fan)
servo = PWM(Pin(18))
servo.freq(50)

# ---------------- SERVO FUNCTION ----------------
def set_servo_angle(angle):
    # Correct PWM mapping for Pico W
    duty = int(1638 + (angle / 180) * (8192 - 1638))
    servo.duty_u16(duty)

# Initial states
light.value(0)
set_servo_angle(0)   # Fan OFF

# ---------------- WIFI CONNECT ----------------
print("Connecting to WiFi...")
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(SSID, PASSWORD)

while not wifi.isconnected():
    time.sleep(0.2)

print("WiFi Connected")
print("IP:", wifi.ifconfig())
print("----------------------------------")

# ---------------- VARIABLES ----------------
aio_value = "OFF"
last_cloud_time = 0
CLOUD_INTERVAL = 5   # seconds (safe for Adafruit IO)

# ---------------- MAIN LOOP ----------------
while True:
    now = time.time()

    # -------- CLOUD READ (SLOW & SAFE) --------
    if now - last_cloud_time >= CLOUD_INTERVAL:
        try:
            response = urequests.get(AIO_URL, headers=HEADERS)
            data = ujson.loads(response.text)
            response.close()
            aio_value = data.get("value", "OFF")
        except:
            pass
        last_cloud_time = now

    # -------- BUTTON --------
    button_state = button.value()

    # -------- LIGHT CONTROL --------
    if aio_value == "ON" or button_state == 1:
        light.value(1)
        light_state = "ON"
    else:
        light.value(0)
        light_state = "OFF"

    # -------- DHT22 + SERVO FAN CONTROL --------
    try:
        sensor.measure()
        temp = sensor.temperature()
        hum = sensor.humidity()

        if temp > 30:
            set_servo_angle(90)   # Fan ON
            fan_state = "ON"
        else:
            set_servo_angle(0)    # Fan OFF
            fan_state = "OFF"

        # -------- FAST CLEAN OUTPUT --------
        print("Light", light_state,
              "| Temp:", temp, "°C",
              "| Hum:", hum, "%",
              "| Fan", fan_state)

    except:
        pass

    time.sleep(0.5)   # FAST OUTPUT