import time
from neopixel import NeoPixel
from machine import Pin

pressed = True
leds = [22, 21, 19, 18, 5, 4, 2, 15]
keys=[["1","2","3","A"],\
    ["4","5","6","B"],\
    ["7","8","9","C"],\
    ["*","0","#","D"]
    ]
ledRing = NeoPixel(Pin(13, Pin.OUT), 16)

colPins = [ 5, 4, 2, 15]
rowPins = [ 22, 21, 19, 18]

for x in range(4):
    colPins[x] = Pin(colPins[x], Pin.OUT)

for x in range(4):
    rowPins[x] = Pin(rowPins[x], Pin.OUT)

def Keypad4x4Read(cols,rows, pressing):
    for r in rows:
        r.value(1)
        result=[cols[0].value(),cols[1].value(),cols[2].value(),cols[3].value()]
        if max(result)==1:
            if pressing:
                pressing = False
                key=keys[int(rows.index(r))][int(result.index(1))]
                return key, pressing
        else:
            pressing = True
    return None, pressing
pin1 = Pin(22,Pin.OUT)
print(pin1.value(1))
print(type(pin1))

cur_num = ""

while True:
    key, pressed = Keypad4x4Read(colPins, rowPins, pressed)
    if key != None and pressed == False:
        if len(cur_num) <= 3:
            cur_num += str(key)
        else: 
            ur_num = cur_num[1:]

        print(cur_num)
        time.sleep(0.05)