from machine import Pin
from time import sleep
import LiquidCrystal_I2C
import Keypad

# Pin configuration
RELAY_PIN = 19
row_pins = [12, 14, 27, 26]  # GPIO pins connected to the keypad rows
col_pins = [25, 33, 32, 17]  # GPIO pins connected to the keypad columns

# Passwords
password_1 = "1234"
password_2 = "4444"
password_3 = "55555"
input_password = ""

# Initialize LCD and keypad
lcd = LiquidCrystal_I2C(0x27, 16, 2)  # Address: 0x27, 16x2 display
keypad = Keypad(row_pins, col_pins)
relay = Pin(RELAY_PIN, Pin.OUT)
relay.value(1)  # Lock the door initially (active low)

lcd.init()
lcd.backlight()

def reset_password():
    """Resets the entered password and clears the LCD."""
    global input_password
    input_password = ""
    lcd.clear()

def unlock_door():
    """Unlocks the door for 20 seconds and displays a success message."""
    lcd.clear()
    lcd.putstr("CORRECT!\nDOOR UNLOCKED!")
    relay.value(0)  # Unlock the door
    sleep(20)       # Wait for 20 seconds
    relay.value(1)  # Lock the door
    reset_password()

def deny_access():
    """Denies access and displays an error message."""
    lcd.clear()
    lcd.putstr("INCORRECT!\nACCESS DENIED!")
    sleep(2)
    reset_password()

while True:
    key = keypad.get_key()
    if key:
        print("Key Pressed:", key)
        if key == '*':
            reset_password()
        elif key == '#':
            if input_password in [password_1, password_2, password_3]:
                unlock_door()
            else:
                deny_access()
        else:
            input_password += key
            if len(input_password) == 1:
                lcd.clear()
            lcd.set_cursor(len(input_password) - 1, 0)
            lcd.putstr('*')  # Show '*' for hidden input