@Christian-Ehrlicher it's printed

@UvQtcYZJuD7J5VW7 said in QByteArray to LabVIEW Byte Array conversion:

I need to include Labview extcode.h

Yes, that's right.

and when I include it, I get errors about my compiler (platdefines.h doens't recognize my compiler when I'm in Qt Creator).

Then you just need to address the error.

If you use MSVC, it will work fine out-of-the-box.

If you want to use MinGW, you can modify platdefines.h and add these 2 lines to define your compiler:

... #elif defined(__GNUC__) // <-- Add this #define Compiler kGCC // <-- Add this #else #error "We don't know the Compiler" #endif

QImage::save() doesn't get the raw bytes of the image, it converts the image to a file format.
If you really want the raw bytes, do something like

QByteArray ba((const char *)preview.constBits(), preview.byteCount());

Okay, I have solved the problem with a workaround: In the code for my development board I added a new line character after every value.
Then, in my Qt code I check every time the SLOT is called if the value does have a new line char.
Either the value is saved in another variable until it receives a value with a new line character or it is output immediately (if it has a new line character).

static QString newValue= ""; void MainWindow::updateData(const QLowEnergyCharacteristic &c,const QByteArray &value) { newValue = newValue + (QString)value; if (newValue.contains("\n") || newValue.contains("\r")){ ui->dataList->addItem(newValue.simplified()); ui->dataList->scrollToBottom(); newValue = ""; } }

@jsulm we make an installation file for our combined system, including multiple programs sharing some but not other resources. we use an nsi script to manage this. usually works fine. I just missed updating some of the .dll files.

@JNBarchan thank you for the detailed answer.

@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;"