from machine import Pin, I2C, PWM
import utime
from time import sleep
from pico_i2c_lcd import I2cLcd
from picozero import Speaker

speaker = Speaker(15)
buzz = 1
PIR = Pin(13,Pin.IN, Pin.PULL_UP)

i2c = I2C(0, sda=Pin(0), scl=Pin(17), freq=400000)
I2C_ADDR = i2c.scan()[0]
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)  

col_list=[1,2,3,4]
row_list=[5,6,7,8]

PASSWORD = "1234" # change me
user_password = ""

for x in range(0,4):
    row_list[x]=Pin(row_list[x], Pin.OUT)
    row_list[x].value(1)
 
for x in range(0,4):
    col_list[x] = Pin(col_list[x], Pin.IN, Pin.PULL_UP)
 
key_map=[["D","#","0","*"],\
         ["C","9","8","7"],\
         ["B","6","5","4"],\
         ["A","3","2","1"]]
 
def Keypad4x4Read(cols,rows):
  for r in rows:
    r.value(0)
    result=[cols[0].value(),cols[1].value(),cols[2].value(),cols[3].value()]
    if min(result)==0:
      key=key_map[int(rows.index(r))][int(result.index(0))]
      r.value(1) 
      return(key)
    r.value(1)
 
while True:
    key = Keypad4x4Read(col_list, row_list)
    motion = PIR.value()

    if key != None:
        if key != "D":
            lcd.putstr(key)
            user_password+=key
            utime.sleep(0.3) 
        else:
            if user_password == PASSWORD:
                lcd.clear()
                lcd.putstr("CORRECT PASSWORD")
                utime.sleep(2)
                lcd.clear()
                buzz = 0
            else:
                lcd.clear()
                lcd.putstr("INCORRECT PASSWORD")
                speaker.on()
                utime.sleep(2)
                speaker.off()
                lcd.clear()

    if motion == 1 and buzz == 1:
        speaker.on()