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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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import os
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import json
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import sys
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import RPi.GPIO as GPIO
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import serial
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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 = 'cardexport.json'
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OPEN_DURATION = 5
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ser = None
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recent = {}
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cards = {}
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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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with open(CARDS_FILE, 'r') as f:
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cards = json.load(f)
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logging.info('Read in {} card numbers.'.format(str(len(cards))))
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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 handle_card_read(card):
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if card in cards:
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logging.info('Card recognized.')
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member = cards[card]
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else:
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logging.info('Card not recognized. Denying access.')
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return
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if member['enabled']:
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logging.info('Member active.')
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else:
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logging.info('Member not active. Denying access.')
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return
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logging.info('DOOR ACCESS - Card: {} | Name: {} | id: {}'.format(
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card, member['name'], member['id']))
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unlock_door()
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def loop():
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card = ser.readline()
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if not card:
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return
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card = card.decode().strip()
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if len(card) != 10:
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return
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now = time.time()
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if card in recent:
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if now - recent[card] < 5.0:
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recent[card] = now
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return
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recent[card] = now
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logging.info('\nRead card #' + card)
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handle_card_read(card)
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if __name__ == '__main__':
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logging.info('Initializing...')
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init()
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logging.info('Running main loop...')
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try:
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while True:
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loop()
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except KeyboardInterrupt:
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logging.info('Exiting...')
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