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93 lines
2.2 KiB
93 lines
2.2 KiB
4 years ago
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import logging
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logging.basicConfig(
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format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
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level=logging.INFO)
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from multiprocessing import Process, Queue
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from queue import Empty
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import time
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RELAY_PIN = 17
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RFID_EN_PIN = 27
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CARDS_FILE = 'card_data.json'
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OPEN_DURATION = 4
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ser = None
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def init():
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global ser, cards
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GPIO.setwarnings(False)
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GPIO.setmode(GPIO.BCM)
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GPIO.setup(RELAY_PIN, GPIO.OUT)
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GPIO.output(RELAY_PIN, GPIO.LOW)
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GPIO.setup(RFID_EN_PIN, GPIO.OUT)
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GPIO.output(RFID_EN_PIN, GPIO.LOW)
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logging.info('GPIO initialized')
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ser = serial.Serial(port='/dev/ttyAMA0', baudrate=2400, timeout=0.1)
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logging.info('Serial initialized')
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def unlock_door():
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GPIO.output(RELAY_PIN, GPIO.HIGH)
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GPIO.output(RFID_EN_PIN, GPIO.HIGH)
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time.sleep(OPEN_DURATION)
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GPIO.output(RELAY_PIN, GPIO.LOW)
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GPIO.output(RFID_EN_PIN, GPIO.LOW)
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def reader_thread(card_data_queue):
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recent_scans = {}
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with open(CARDS_FILE, 'r') as f:
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card_data = json.load(f)
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logging.info('Read {} card numbers from disk'.format(str(len(card_data))))
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while True:
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try:
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card_data = card_data_queue.get_nowait()
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except Empty:
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pass
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card = ser.readline()
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if not card: continue
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card = card.decode().strip()
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if len(card) != 10: continue
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# debounce card scans
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now = time.time()
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if card in recent_scans:
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if now - recent_scans[card] < 5.0:
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continue
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recent_scans[card] = now
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logging.info('Read card: ' + card)
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if card in card_data:
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logging.info('Card recognized')
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else:
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logging.info('Card not recognized, denying access')
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continue
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logging.info('DOOR ACCESS - Card: {} | Name: {}'.format(
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card, card_data[card],
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))
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unlock_door()
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def update_thread(card_data_queue):
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while True:
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pass
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if __name__ == '__main__':
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logging.info('Initializing...')
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init()
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card_data = Queue()
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Process(target=reader_thread, args=(card_data,)).start()
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Process(target=update_thread, args=(card_data,)).start()
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