MksManager mksManager;

QEventLoop eventLoop;
QObject::connect(&mksManager, &MksManager::connectionFinished,
                 &eventLoop, &QEventLoop::quit);
mksManager.connectToDevice();
eventLoop.exec();

if (mksManager.status() != 1) {
    mksManager.connectToDevice();
    eventLoop.exec();
}

if (mksManager.status() != 1)
    throw std::runtime_error(tr("Error of connecting to device.").toStdString());

int code = 0;
QByteArray checkpointsByteArray = mksManager.getCheckpoints(code);
if (code != 0)
    throw std::runtime_error(tr("Error of reading checkpoints.xml from device.").toStdString());