#include <QCoreApplication>
#include <QTimer>

#include <QSerialPort>
#include <QSerialPortInfo>

bool searchPort()
{
    QList<QSerialPortInfo> availableports = QSerialPortInfo::availablePorts();
    if(availableports.size() > 0) {
        qDebug("Available ports:");
        uint _port = 0;
        foreach (const QSerialPortInfo &_portinfo, availableports)
            qDebug("  %u) [%s] %s", _port++, _portinfo.portName().toUtf8().constData(), _portinfo.description().toUtf8().constData());
    } else {
        qDebug("No available ports found!");
    }
    foreach (const QSerialPortInfo &_portinfo, availableports) {
        if(_portinfo.description().contains("CH340") ||
           _portinfo.description().contains("CP210") ||
           _portinfo.description().contains("USB2.0-Serial")) {
            qDebug("  ===\nCheking [%s] %s",_portinfo.portName().toUtf8().constData(), _portinfo.description().toUtf8().constData());
            QSerialPort _tmpport(_portinfo);
            QByteArray _data;
            QObject::connect(&_tmpport,&QSerialPort::readyRead,[&_tmpport, &_data](){
                _data.append(_tmpport.readAll());
            });
            if(_tmpport.open(QIODevice::ReadWrite)) {
                QTimer::singleShot(2000,[&_tmpport,&_data](){
                    _data.clear();
                    qDebug("  Device token request...");
                    _tmpport.write("T");
                });
                QEventLoop _el;
                QTimer::singleShot(2500,&_el,SLOT(quit()));
                _el.exec();
                qDebug("  Received token: '%s'", _data.constData());
                if(_data == "{6F9619FF-8B86-D011-B42D-00CF4FC964FF}") {
                    _tmpport.close();
                    qDebug("Port found");
                    return true;
                }
            }
        }
    }
    qDebug("Port not found!");
    return false;
}

int main(int argc, char *argv[])
{
    QCoreApplication app(argc,argv);
    searchPort();
    return app.exec();
}