linux qt bluetoothctl蓝牙主动配对和被动配对demo

以下是一个使用Qt和Bluez库的简单蓝牙被动配对的demo：

#include <QCoreApplication>
#include <QDBusConnection>
#include <QDBusMessage>
#include <QDBusReply>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // D-Bus连接
    QDBusConnection bus = QDBusConnection::systemBus();

    // 连接Bluez服务
    if (!bus.isConnected()) {
        qWarning() << "D-Bus connection failed";
        return 1;
    }
    QDBusMessage msg = QDBusMessage::createMethodCall("org.bluez", "/", "org.bluez.AgentManager1", "RegisterAgent");
    msg << QDBusObjectPath("/bluez/agent");
    msg << "NoInputNoOutput";
    bus.call(msg);

    // 设置代理为默认代理
    msg = QDBusMessage::createMethodCall("org.bluez", "/", "org.bluez.AgentManager1", "RequestDefaultAgent");
    msg << QDBusObjectPath("/bluez/agent");
    bus.call(msg);

    // 开启蓝牙可检测性
    msg = QDBusMessage::createMethodCall("org.bluez", "/org/bluez/hci0", "org.bluez.Adapter1", "SetDiscoverable");
    msg << true;
    bus.call(msg);

    // 监听PairingRequest信号
    bus.connect("org.bluez", "/org/bluez/agent", "org.bluez.Agent1", "AuthorizeService",
                [](const QDBusMessage &msg) {
        qDebug() << "PairingRequest:" << msg.arguments();
        return QDBusMessage::createMethodReturn(msg.arguments().at(0).value<QDBusObjectPath>(), QByteArray());
    });

    return a.exec();
}

这个demo使用了DBus与Bluez服务进行通信，注册了一个名为“/bluez/agent”的代理，监听了PairingRequest信号并返回空密码。

以下是一个使用Qt和Bluez库的简单蓝牙主动配对的demo：

#include <QCoreApplication>
#include <QDBusConnection>
#include <QDBusMessage>
#include <QDBusReply>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // D-Bus连接
    QDBusConnection bus = QDBusConnection::systemBus();

    // 连接Bluez服务
    if (!bus.isConnected()) {
        qWarning() << "D-Bus connection failed";
        return 1;
    }

    // 获取蓝牙适配器对象路径
    QDBusMessage msg = QDBusMessage::createMethodCall("org.bluez", "/", "org.bluez.Manager", "GetDefaultAdapter");
    QDBusReply<QDBusObjectPath> reply = bus.call(msg).value();
    if (!reply.isValid()) {
        qWarning() << "Cannot get default adapter";
        return 1;
    }
    QString adapterPath = reply.value().path();

    // 开始搜索蓝牙设备
    msg = QDBusMessage::createMethodCall("org.bluez", adapterPath, "org.bluez.Adapter1", "StartDiscovery");
    bus.call(msg);

    // 等待设备被发现
    QEventLoop loop;
    QTimer timeoutTimer;
    timeoutTimer.setSingleShot(true);
    QObject::connect(&timeoutTimer, &QTimer::timeout, &loop, &QEventLoop::quit);
    timeoutTimer.start(10000);
    bus.connect("org.bluez", adapterPath, "org.bluez.Adapter1", "DeviceFound",
                [&loop](const QDBusMessage &msg) {
        qDebug() << "DeviceFound:" << msg.arguments();
        loop.quit();
    });
    loop.exec();

    // 获取已发现的设备列表
    msg = QDBusMessage::createMethodCall("org.bluez", adapterPath, "org.bluez.Adapter1", "GetDiscoveryFilters");
    reply = bus.call(msg).value();
    if (!reply.isValid()) {
        qWarning() << "Cannot get discovery filters";
        return 1;
    }
    QList<QVariant> filters = reply.value().toList();
    QString address;
    for (const auto &filter : filters) {
        if (filter.toMap().value("Transport").toString() == "le") {
            address = filter.toMap().value("Address").toString();
            break;
        }
    }
    if (address.isEmpty()) {
        qWarning() << "Cannot find LE device";
        return 1;
    }

    // 停止搜索蓝牙设备
    msg = QDBusMessage::createMethodCall("org.bluez", adapterPath, "org.bluez.Adapter1", "StopDiscovery");
    bus.call(msg);

    // 连接蓝牙设备
    msg = QDBusMessage::createMethodCall("org.bluez", "/", "org.bluez.Device1", "Connect");
    msg << QDBusObjectPath(QString("/org/bluez/%1/dev_%2").arg(adapterPath.split("/").last()).arg(address.replace(":", "_")));
    bus.call(msg);

    // 等待配对完成
    loop.exec();

    return 0;
}

这个demo使用了DBus与Bluez服务进行通信，搜索并连接了一个LE设备，并等待配对完成。