79 lines
2.4 KiB
Python
79 lines
2.4 KiB
Python
import time
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from datetime import datetime, timedelta
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from smartcard.CardRequest import CardRequest
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from smartcard.Exceptions import CardConnectionException, NoCardException
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from smartcard.CardConnection import CardConnection
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from smartcard.util import toHexString
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from pynput.keyboard import Controller
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from card_reader import read_card
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class NfcReaderService:
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def __init__(self) -> None:
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self._is_running = True
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self._last_uid = None
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self._keyboard = Controller()
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self._last_write = datetime(1900, 1, 1)
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def run(self) -> None:
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print("Reader ready.")
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while self._is_running:
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try:
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time.sleep(0.1)
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card_request = CardRequest(timeout=None)
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print("Waiting for card...")
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card_service = card_request.waitforcard()
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connection = card_service.connection
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print("Connected to card!")
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try:
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connection.connect(CardConnection.T1_protocol)
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GET_UID = [0xFF, 0xCA, 0x00, 0x00, 0x00]
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uid, sw1, sw2 = connection.transmit(GET_UID)
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if sw1 != 0x90:
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raise CardConnectionException("UID read failed")
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uid_hex = toHexString(uid)
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if uid_hex == self._last_uid:
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connection.disconnect()
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time.sleep(0.5)
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self._last_uid = None
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continue
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self._last_uid = uid_hex
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user_id = read_card(connection)
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if user_id is not None:
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now = datetime.now()
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if now - self._last_write > timedelta(seconds=2):
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self._keyboard.type(str(user_id))
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self._last_write = now
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except (CardConnectionException, NoCardException):
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pass
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finally:
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try:
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connection.disconnect()
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except:
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pass
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time.sleep(0.5)
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except (KeyboardInterrupt, SystemExit):
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self.stop()
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def stop(self) -> None:
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self._is_running = False
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if __name__ == "__main__":
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service = NfcReaderService()
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service.run()
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