from machine import Pin
from time import sleep
from math import floor
import utime
a=0

# Connect Keypad pins as below
col_list=[1,2,3,4]
row_list=[5,6,7,8]


buzzer = Pin(16, Pin.OUT)


#Set rows pin as output
for x in range(0,4):
    row_list[x]=Pin(row_list[x], Pin.OUT)
    row_list[x].value(1)

#Set column as input
for x in range(0,4):
    col_list[x] = Pin(col_list[x], Pin.IN, Pin.PULL_UP)

# Create a map between keypad buttons and chars
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) # manages key keept pressed
      return(key)
    r.value(1)

# Start the main loop
print("--- Ready to get user inputs ---")
a = ''
counter = 0

while True:
    key = Keypad4x4Read(col_list, row_list)
    
    if key is not None:
        a += key
        counter += 1
        print("Pressed button: " + key)
        utime.sleep(0.3)

    if counter == 3:
        if a == "222":
            print("Buzzer will turn on for 3 seconds.")
            # Turn on the buzzer
            buzzer.value(1)
            # Wait for 3 seconds
            utime.sleep(3)
            # Turn off the buzzer
            buzzer.value(0)
        else:
            print("Angka yang anda inputkan salah.")
        
        a = ''
        counter = 0