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import sys
import threading
from gpiozero import LED, RGBLED, Button, Buzzer
from time import time, sleep
from signal import pause
from random import randint
STATUS_BLOCKED = (0,0,0)
STATUS_LOCK = (1,0,0)
STATUS_UNLOCK = (0,1,0)
STATUS_FIRST_EDIT = (0,0,1)
STATUS_SECOND_EDIT = (1,0,1)
STATUS_CONFIRMATION = (1,1,1)
STATUS_SUCESSFUL = (0.1,1,0)
button0 = Button(24, False)
button1 = Button(25, False)
button2 = Button(8, False)
button3 = Button(7, False)
buttons = [button0, button1, button2, button3]
led0 = LED(12)
led1 = LED(16)
led2 = LED(20)
led3 = LED(21)
leds = [led0,led1,led2,led3]
ledRGB = RGBLED(26, 19, 13)
bz = Buzzer(17)
MAX_ATTEMPTS = 3
DEFAULT_PWD = [0,1,2,3]
class Keypad():
t0 = time()
password = DEFAULT_PWD
keypad_status = STATUS_LOCK
keypad_blocked = False
keypad_attempts = MAX_ATTEMPTS
selected_key = ""
edit_type = STATUS_LOCK
def ___init___(self):
self.reset()
def reset(self):
self.t0 = time()
def set_password(self, passw):
self.password = passw
def set_keypad_status(self, set):
self.keypad_status = set
self.edit_type = set
def set_keypad_blocked(self,set):
self.keypad_blocked = set
def set_keypad_attempts(self, set):
self.keypad_attempts = set
def reduce_attempts(self):
self.keypad_attempts -= 1
def check_attempts(self):
if self.keypad_attempts <= 0:
self.reset_attempts()
return False
else:
return True
def reset_attempts(self):
self.keypad_attempts = MAX_ATTEMPTS
def set_edit_type(self, set):
self.edit_type=set
def set_selected_key(self, key):
self.selected_key = key
def waif_for_press_any_button(msg, buttons):
k.reset()
print(msg)
while True:
for i in range(len(buttons)):
if check_button_release(i):
k.set_selected_key(str(i))
return str(i)
return False
def check_button_release(i):
if buttons[i].is_pressed:
while buttons[i].is_pressed:
leds[i].on()
pass
k.reset()
leds[i].off()
return True
return False
def get_button_pressed(i, p):
if buttons[i].is_pressed:
while buttons[i].is_pressed:
leds[i].on()
pass
k.reset()
p.append(i)
leds[i].off()
def get_password():
p=list()
k.reset()
while True:
for i in range(len(buttons)):
get_button_pressed(i, p)
if time()-k.t0 > 4:
break
return p
def validate_password():
validation = False
k.set_edit_type(STATUS_CONFIRMATION)
if k.password == get_password():
validation = True
k.reset_attempts()
else:
k.reduce_attempts()
k.set_edit_type(k.keypad_status)
return validation
def get_new_password():
k.set_edit_type(STATUS_FIRST_EDIT) #<--- blink blue
p = list()
print ("\nEnter the new password :")
p1 = get_password()
if len(p1) < 4 :
print("\nThe password must have 4 or more keys")
else:
if(p1 == k.password):
print("\nThe new password must be different from the current one")
else:
k.set_edit_type(STATUS_SECOND_EDIT) #<--- blink violeta
print ("\nRetype the new password :")
p2 = get_password()
if p1 == p2:
k.set_password(p2)
print("\nCongratulations you have a new password")
k.set_edit_type(STATUS_SUCESSFUL)
sleep(2) #<--- blink to confirm sucess
k.set_edit_type(k.keypad_status)
return True
else:
print("\nWrong Password Entry. Try Again ")
k.set_edit_type(k.keypad_status)
return False
def set_color (color):
ledRGB.color = color
def alternate_color():
while True:
if k.keypad_status!=STATUS_LOCK or k.keypad_status!=STATUS_UNLOCK:
ledRGB.color = k.keypad_status
sleep(0.1)
set_color(k.edit_type)
sleep(0.1)
if k.keypad_blocked:
set_color(k.keypad_status)
sleep(0.1)
set_color(STATUS_BLOCKED)
sleep(0.05)
set_color(k.keypad_status)
sleep(0.1)
set_color(STATUS_BLOCKED)
sleep(1)
def thread_colorRGB():
t = threading.Thread(target=alternate_color, args=())
t.daemon = True
t.start()
def buzz(pitch, duration):
if (pitch == 0):
sleep(duration)
return
period = 1.0 / pitch
delay = period / 2
cycles = int(duration * pitch)
for i in range(cycles):
bz.on()
sleep(delay)
bz.off()
sleep(delay)
def toneFail():
pitches=[1047, 988,659]
duration=0.1
for p in pitches:
buzz(p, duration)
sleep(duration *0.5)
def toneSucess():
pitches=[262,294,330,349,392,440,494,523, 587,659,698,784,880,988,1047]
duration=0.04
for p in pitches:
buzz(p, duration)
sleep(duration *0.5)
k=Keypad()
menu0="""
::: KEYPAD ACCESS OPTIONS :::
0 . Modify The Current Password
1 . Lock / Unlock Keypad
"""
thread_colorRGB()
theEnd = False
while theEnd == False:
set_color(k.keypad_status)
print(k.password)
if not k.check_attempts():
k.set_keypad_blocked(True)
t=randint(5,10)
print("\nThere have been three failed validation attempts, the keypad will be temporarily locked")
sleep(t)
k.set_keypad_blocked(False)
print("\nThe keypad is again operational")
try:
#command = input(menu0)
command = waif_for_press_any_button(menu0, buttons)
if (command=="0"): #<-- change password
print("\nTo change the password before you must enter the current password")
if validate_password():
print("\nCorrect Current Password !!!")
if get_new_password():
toneSucess()
else:
toneFail()
else:
toneFail()
print("\nX X X Invalid Current Password X X X ")
elif (command=="1"): #<-- lock & unlock keypad
if k.keypad_status==STATUS_LOCK: #<-- unlock
print("\nTo UNLOCK the system enter the current password")
if validate_password():
print("\nCorrect Current Password !!!")
print("Unlocked System !!!")
k.set_keypad_status(STATUS_UNLOCK)
toneSucess()
else:
print("\nX X X Invalid Current Password X X X ")
print("X X X Locked System X X X")
toneFail()
elif k.keypad_status==STATUS_UNLOCK: #<-- lock
print("\nTo LOCK the system enter the current password")
if validate_password():
print("\nCorrect Current Password !!!")
print("Locked System !!!")
k.set_keypad_status(STATUS_LOCK)
toneSucess()
else:
print("\nX X X Invalid Current Password X X X ")
print("X X X Unlocked System X X X")
toneFail()
elif (command=="2"):
pass
elif (command=="3"):
pass
except:
print("\nUnexpected Error", sys.exc_info()[0])
theEnd = True
quit()
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