At first I was having this output:

<< 80
<< 3b
0x80 command case 3b
<< 1
<< 0
WiD = W1.csv
size of transfer = 13 bytes"1";"10111213141516171819"
highNibble = 1 lowNibble = 0
highNibble = 1 lowNibble = 1
highNibble = 1 lowNibble = 2
highNibble = 1 lowNibble = 3
highNibble = 1 lowNibble = 4
highNibble = 1 lowNibble = 5
highNibble = 1 lowNibble = 6
highNibble = 1 lowNibble = 7
highNibble = 1 lowNibble = 8
highNibble = 1 lowNibble = 9
Text read and send!

Though it is well it lacks something, you don't see the byte value the machine transmits. So in my send function I added one line of code.

communication_log << cAsHex << ">> \n";  // communication log is a Qdatastream which stuffs bytes in a .txt file

I have near identical line in qDebug(), the debug output did look fine:

"\u0016"  >>
highNibble = 1 lowNibble = 6
"\u0017"  >>
highNibble = 1 lowNibble = 7
"\u0018"  >>
highNibble = 1 lowNibble = 8
"\u0019"  >>
highNibble = 1 lowNibble = 9
Text read and send!

But how did the logfile look like?:

ਣ㰼㠠ਰ㰼㌠੢砰〸挠浯慭摮挠獡⁥戳㰊‼쌱㺿‾Ἂ㸾ਠ㸊‾
㸾ਠ㸐‾ᄊ㸾ਠ㸒‾ጊ㸾ਠ㸔‾ᔊ㸾ਠ㸖‾ᜊ㸾ਠ㸘‾ᤊ㸾ਠ㰊‼ਰ楗⁄‽ㅗ挮癳猊穩⁥景琠慲獮敦⁲‽㌱戠瑹獥ㄢ㬢ㄢ㄰ㄱㄲㄳㄴㄵㄶㄷㄸ∹栊杩乨扩汢⁥‽‱潬乷扩汢⁥‽ਰ楨桧楎扢敬㴠ㄠ氠睯楎扢敬㴠ㄠ栊杩乨扩汢⁥‽‱潬乷扩汢⁥‽ਲ楨桧楎扢敬㴠ㄠ氠睯楎扢敬㴠㌠栊杩乨扩汢⁥‽‱潬乷扩汢⁥‽਴楨桧楎扢敬㴠ㄠ氠睯楎扢敬㴠㔠栊杩乨扩汢⁥‽‱潬乷扩汢⁥‽ਸ਼楨桧楎扢敬㴠ㄠ氠睯楎扢敬㴠㜠栊杩乨扩汢⁥‽‱潬乷扩汢⁥‽ਸ楨桧楎扢敬㴠ㄠ氠睯楎扢敬㴠㤠吊硥⁴敲摡愠摮猠湥Ⅴ迂㸾ਠ迂㸾ਠ迂㸾ਠ迂㸾ਠ迂㸾ਠ迂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ诂㸾ਠ诂㸾ਠ軂㸾ਠ軂㸾ਠ賂㸾ਠ賂㸾ਠ跂㸾ਠ跂㸾ਠ诂㸾ਠ诂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ跂㸾ਠ

Everything was in I believe Chinese. For the fun I also stuffed in Google translate. It could not auto ID the language so I manually selected Chinese. It also did not want to translate into english but it did translate in my native language dutch. I must add that this.... thing.. occured while viewing it in the program 'gedit' of ubuntu. Using the terminal and nano it looked normal.

As example this characters 跂 does not translate in english but in Dutch I got "voet met zes tenen" or "Feet with six toes" :D. Gotta luv computers and programming

The 'guilty' function is:

void MainWindow::send(QString c)  // c is a single byte casted to a QString
{
    timer->start(2);         // sets a timer at 2 ms

    serial->write(c.toLatin1()); // sends a byte overthe serial port
    QString cAsHex = QString("%1").arg(c, 0, 16); // makes a hex value to be shown on the CLI

    qDebug() << cAsHex << " >>"; // show the send byte as a Hex value

    QFile log("communication_log.txt");
    log.open(QIODevice::Append);
    QTextStream communication_log(&log);
    communication_log << cAsHex << ">> \n"; // I tried all kinds of combination and type casts and such, seems to have no effect
    log.close();

    while (Timer == true) {;}    // waits for timeOut to happen
}

How can that one line of code change the text file so gedit things it the content is some kind of unicode for Chinese??