1 #!/usr/bin/env python3

     2 

     3 import time

     4 import automationhat

     5 import sys

     6 

     7 import queue

     8 import threading

     9 

    10 

    11 def main():

    12     command_queue = queue.LifoQueue()

    13     read_thread = threading.Thread(target=read_loop, args=[command_queue])

    14     read_thread.start()

    15     run_loop(command_queue)

    16 

    17 

    18 def read_loop(command_queue):

    19     while True:

    20         command_queue.put_nowait(sys.stdin.readline().rstrip('\n'))

    21 

    22 

    23 def run_loop(command_queue):

    24     thread_local = threading.local()

    25     thread_local.doorbell_on_state = False

    26 

    27     while True:

    28         run_command(command_queue)

    29         read_doorbell(thread_local)

    30 

    31 

    32 def run_command(command_queue):

    33     try:

    34         command = command_queue.get(timeout=0.5)

    35     except queue.Empty:

    36         pass

    37     else:

    38         automationhat.relay.on() if command == "unlock" else automationhat.relay.off()

    39 

    40 

    41 def read_doorbell(thread_local):

    42     analog_value = automationhat.analog.one.read()

    43     doorbell_on_state = 6.0 < analog_value and analog_value < 6.3

    44 

    45     if doorbell_on_state != thread_local.doorbell_on_state:

    46         thread_local.doorbell_on_state = doorbell_on_state

    47         print("doorbell_on") if doorbell_on_state else print("doorbell_off")

    48 

    49 

    50 if __name__ == "__main__":

    51     main()