How to use QSerialPort for double thread

[anda_skoa]

My guess is that the problem is your missing Q(Core/Ui)Application instance.
So the main thread is not "adopted" as a QThread and thus lacks the necessary event dispatcher for socketnotifier's event handling.

Cheers,
_

[nistar]

The Qt documentation says:


The serial port read in your case probably happens in a separate thread.. You need to make sure read and write happens in the same thread in which you open the port. Hope that helps..

Regards
Vikram

But how to do it?
I think that my program use only one thread.

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Added after 15 minutes:

My guess is that the problem is your missing Q(Core/Ui)Application instance.
So the main thread is not "adopted" as a QThread and thus lacks the necessary event dispatcher for socketnotifier's event handling.

Cheers,
_

Make a widgets project?

[anda_skoa]

Make a widgets project?

If you don't have any Qt UI then you don't need a widgets project.
But you need an instance of QCoreApplication (or on of its subclasses) and run its event loop (by calling its exec() function).

Just try to start with an empty main() function.
Then creating and configuring the QSerialPort instance.
Then maybe trying to write a fixed command.

When that works, add the original code instead of the test QSerialDevice code.

Cheers,
_

[Vikram.Saralaya]

Try replacing QT += serialport with QT += core serialport in the pro file

[nistar]

My guess is that the problem is your missing Q(Core/Ui)Application instance.
So the main thread is not "adopted" as a QThread and thus lacks the necessary event dispatcher for socketnotifier's event handling.

Cheers,
_

O, I do it.
Only make a application project, and copy the code.

Thanks