1// Copyright (C) 2022 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
7\ingroup connectivity-nfc
10\brief Notes on PC/SC support in Qt Nfc.
12PC/SC support is provided using native APIs on macOS and Windows, and using
13\l{https://pcsclite.apdu.fr/}{PCSCLite} library on other platforms. The API
14can be used for accessing both wired and wireless smartcards and storage cards.
19 \li The current API does not provide means to distinguish between separate
21 \li NDEF access is only provided for NFC Type 4 tags.
22 \li Other applications starting transactions on cards may block Qt applications
23 from using Qt Nfc API.
24 \li QNearFieldTarget::sendCommand() used with a PC/SC target starts
25 a transaction that remains active until QNearFieldTarget::disconnect()
26 is called. This transaction prevents other applications from accessing
28 \li The backend is polling for new tags, that means that there
29 may be a delay up to the full polling interval before new tags are reported.
30 The default polling interval is 100 milliseconds. It can be adjusted
31 by setting environment valiable \c{QT_NFC_POLL_INTERVAL_MS} to an integer
32 value in milliseconds.