#include <QtCore>
#include <QtBluetooth>

int main(int argc, char *argv[]) {
    QCoreApplication app(argc, argv);
    QTextStream out(stdout);
    QBluetoothDeviceDiscoveryAgent agent;
    agent.setLowEnergyDiscoveryTimeout(6000);
    auto show = [&](QString tag, const QBluetoothDeviceInfo &info) {
        auto id = info.address().isNull() ? info.deviceUuid().toString()
                                          : info.address().toString();
        out << tag << " " << info.name() << " [" << id
            << "] isCached=" << info.isCached()
            << " rssi=" << info.rssi() << "\n";
    };
    QObject::connect(&agent, &QBluetoothDeviceDiscoveryAgent::deviceDiscovered,
                     [&](auto info){ show("DISC", info); });
    QObject::connect(&agent, &QBluetoothDeviceDiscoveryAgent::deviceUpdated,
                     [&](auto info, auto){ show("UPDT", info); });
    QObject::connect(&agent, &QBluetoothDeviceDiscoveryAgent::finished,
                     [&]{ out << "FINISHED\n"; app.quit(); });
    agent.start(QBluetoothDeviceDiscoveryAgent::LowEnergyMethod);
    return app.exec();
}