2. QByteArray

QString str = "FF050001000089D4";<br />    QByteArray bytes = QByteArray::fromHex(str.toLatin1());<br />    const char *test2= (const char*)(relay2_close);<br />    qDebug() << *(int *)(bytes.data());<br />    qDebug() << *(int *)(relay2_close);