蓝牙 API 提供蓝牙使能设备之间的连接。
目前，API 支持下列平台：
| API 特征 | Android | iOS | Linux (BlueZ 4.x/5.x) | macOS | WinRT | Win32 |
|---|---|---|---|---|---|---|
| 经典蓝牙 | x | x | x | x | ||
| 蓝牙 LE 中心 | x | x | x | x | x | |
| 蓝牙 LE 外围 | x | x | x | x | ||
| 蓝牙 LE 广告和扫描 |
Despite there not being a Win32 port yet, the WinRT backend is automatically used if the win32 target platform supports the required WinRT APIs. Minimal requirement is Windows 10 version 1507 with slightly improved service discovery since Windows 10 version 1607. Therefore Windows 7 and 8.x targets are excluded.
Bluetooth is a short-range (less than 100 meters) wireless technology. It has a reasonably high data transfer rate of 2.1 Mbit/s, which makes it ideal for transferring data between devices. Bluetooth connectivity is based on basic device management, such as scanning for devices, gathering information about them, and exchanging data between them.
Qt Bluetooth supports Bluetooth Low Energy development for client/central role use cases. Further details can be found in the 低功耗蓝牙概述 章节。
A new addition since the Qt Bluetooth 5.7 release covers support for Bluetooth Low Energy applications performing the peripheral/server role. This new API remains in Technology Preview.
要使用 C++ 库在应用程序，添加以下配置选项到
.pro
文件：
QT += bluetooth
要在应用程序中使用模块的类，需要以下 import 语句在
.qml
文件：
import QtBluetooth 5.12
Despite the fact that the module can be built for all Qt platforms, the module is not ported to all of them. Not supported platforms such as Windows desktop employ a fake or dummy backend which is automatically selected when the platform is not supported. The dummy backend reports appropriate error messages and values which allow the Qt Bluetooth developer to detect at runtime that the current platform is not supported. The dummy backend is also selected on Linux if BlueZ development headers are not found during build time or Qt was built without Qt D-Bus support.
The usage of the dummy backend is highlighted via an appropriate warning while building and running.
The QtBluetooth 模块导出下列 日志类别 :
| 日志类别 | 描述 |
|---|---|
| qt.bluetooth | Enables logging of cross platform code path in QtBluetooth |
| qt.bluetooth.android | Enables logging of the Android 实现 |
| qt.bluetooth.bluez | Enables logging of the BLuez /Linux implementation |
| qt.bluetooth.ios | Enables logging of the iOS 实现 |
| qt.bluetooth.osx | Enables logging of the macOS 实现 |
| qt.bluetooth.qml | Enables logging of the QtBluetooth QML implementation |
| qt.bluetooth.winrt | Enables logging of the WinRT 实现 |
日志类别可用于启用额外警告和调试输出为
QtBluetooth
。可以找到有关日志的更多详细信息在
QLoggingCategory
. A quick way to enable all
QtBluetooth
logging is to add the following line to the
main()
函数：
QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));
Qt Bluetooth 在商业许可下是可用的来自 Qt 公司 。此外，它是可用的根据 GNU LGPL (次一般公共许可) 第 3 版 ，或 GNU GPL (一般公共许可) 第 2 版 。见 Qt 许可 进一步了解细节。
On Linux, Qt Bluetooth uses a separate executable,
sdpscanner
, to integrate with the official Linux bluetooth protocol stack
BlueZ
.
BlueZ
is available under the
GNU GPL (一般公共许可) 第 2 版
.
| BlueZ | GNU General Public License v2.0 only (This does not force user code to be GPL'ed. For more info see details.) |
