#include <QCoreApplication>
#include <QDataStream>
#include <QBuffer>
#include <QDateTime>
#include <QDebug>

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

    QByteArray ba;
    ba[0]   = 0x00;
    ba[1]   = 0x00;
    ba[2]   = 0x00;
    ba[3]   = 0x00;
    ba[4]   = 0x00;
    ba[5]   = 0x25;
    ba[6]   = 0x7b;
    ba[7]   = 0xc2;
    ba[8]   = 0x05;
    ba[9]   = 0x21;
    ba[10]  = 0x66;
    ba[11]  = 0x78;
    ba[12]  = 0x02;
    ba[13]  = 0x00;
    ba[14]  = 0x00;
    ba[15]  = 0x00;
    ba[16]  = 0x00;
    ba[17]  = 0x00;
    ba[18]  = 0x00;
    ba[19]  = 0x00;

    QBuffer buf;
    buf.setData(ba);
    buf.open(QIODevice::ReadOnly);
    QDataStream in(&buf);
    QDateTime dt;

    qDebug() << "pos:" << in.device()->pos();

    in >> dt;
    qDebug() << dt;

    qDebug() << "pos:" << in.device()->pos();
}