@raven-worx Thank you. I will use UTF-8.

@aha_1980 Thanks for the answer . I will try your sugestions and see how it goes. I've done all this text to ASCII in console codeblocks C++ but it seems that i need a gui to it. I am not as good in Class'es and things like that. I will try it anyways. An example could be more than good for one letter . i could do the rest alone :P . Have a good night

Windows? That explains :-)
I tested on Linux.
I don't know how to fix this on Windows.
Maybe this can help you: http://stackoverflow.com/questions/388490/unicode-characters-in-windows-command-line-how

@mganesh This works fine for me. Your output can not match on what you've written. Please post all your test code

int main(int argc, char **argv) { QCoreApplication app(argc, argv); QString monitorCommand = "020400000006703B"; QByteArray data_to_transmit = QByteArray::fromHex(monitorCommand.toUtf8()); qDebug() << monitorCommand << data_to_transmit; return 0; }

-->
"020400000006703B" "\x02\x04\x00\x00\x00\x06p;"