import machine
import dht
import time

# Pin Definitions
led_pin = machine.Pin(23, machine.Pin.OUT)       # LED connected to GPIO 23
relay_pin = machine.Pin(12, machine.Pin.OUT)     # Relay connected to GPIO 12
button_pin = machine.Pin(13, machine.Pin.IN, machine.Pin.PULL_DOWN)  # Button on GPIO 13
dht_sensor = dht.DHT22(machine.Pin(15))          # DHT22 data pin on GPIO 15

# Initial States
led_state = False
relay_state = False

# Function to toggle LED and relay
def toggle_devices():
    global led_state, relay_state
    led_state = not led_state
    relay_state = not relay_state
    led_pin.value(led_state)
    relay_pin.value(relay_state)
    print(f"LED {'ON' if led_state else 'OFF'}, Relay {'ON' if relay_state else 'OFF'}")

# Function to determine air quality
def get_air_quality(temp, humidity):
    temp_quality = "Normal"
    humidity_quality = "Normal"
    
    # Temperature Ranges (adjust as needed)
    if temp <= 15:
        temp_quality = "Cold"
    elif temp > 15 and temp <= 30:
        temp_quality = "Pleasant"
    else:
        temp_quality = "Hot"
    
    # Humidity Ranges (adjust as needed)
    if humidity <=30:      
        humidity_quality = "Bad"
    elif humidity > 30 and humidity <= 50:
        humidity_quality = "Good"
    else:
        humidity_quality="worst"
    
    return temp_quality, humidity_quality

# Main Loop
print("Home Automation System Starting...")
while True:
    # Check button press
    if button_pin.value() == 1:
        toggle_devices()
        time.sleep(0.5)  # Debounce delay to avoid multiple toggles

    # Read temperature and humidity every 5 seconds
    try:
        dht_sensor.measure()
        temp = dht_sensor.temperature()
        humidity = dht_sensor.humidity()
        
        # Get air quality ranges
        temp_quality, humidity_quality = get_air_quality(temp, humidity)
        
        # Print readings with range indicators
        print(f"Temperature: {temp}°C - {temp_quality}")
        print(f"Humidity: {humidity}% - {humidity_quality}")
        
    except Exception as e:
        print("Error reading DHT22 sensor:", e)

    # Wait and repeat
    time.sleep(5)