from keypad import Keypad 
from machine import Pin

secretCode = '24861305'
isLocked = False
inbuffer = "________"

print("State = UNLOCKED")

def keyPressed(keyValue):
  global isLocked, inbuffer
  if isLocked:
    if keyValue == '#':
      if inbuffer == secretCode:
        isLocked = False
        print(" - Correct, State = UNLOCKED")
      else:
        print(" - Incorrect code.")
      inbuffer = "________"
    else:
      inbuffer = inbuffer[1:] + keyValue
      print(keyValue, end="")
  elif keyValue == '*':
    isLocked = True
    print("State = LOCKED")



kp = Keypad(rows = (Pin(26), Pin(22), Pin(21), Pin(20)),
            columns = (Pin(19), Pin(18), Pin(17), Pin(16)),
            callback = keyPressed)