@JonB
I changed it as you said and it works well!!!

@RuWex
Please look at the QTimer documentation, and the examples there. This does not work by "inserting a delay" into the code where it is called. Rather, it sets off a timer which keeps running, and you supply a "slot"/"callback" which will be invoked when the timer expires. It is in that function/lambda that you do whatever work you wish to perform each time the repeating or singleshot timer expires, e.g. in your case maybe it sends the next character.

@camtheman99
That is interesting, thanks to @Christian-Ehrlicher.

@aliemrenebiler said in Run a terminal command with a button click:

QProcess is not working, the program never opens and says as output "QProcess: Destroyed while process ("...") is still running.".

The problem would appear to be that your QProcess object goes out of scope (is destroyed) while the process you asked it to launch is still running i.e. exactly what the error message says. This is most likely because you have create the QProcess on the stack in the slot handling your button click, but it could be because it is parented to another QObject that is destroyed.

We can only guess without seeing your code.

Hi and welcome to devnet,

There's no ready made "console widget", you can use QPlainTextEdit or depending on the amount of data a QListView with a custom QStyledItemDelegate for fancy rendering.

For getting the output of your cli application, you can use QProcess.

@rggarcia said in Qt 5.8 installation - MacOS Sierra:

qtpcre_debug

Looks like qtpcre_debug was not built. Did you have any errors while compiling? Do you have to build Qt by yourself?

Glad you found out and thanks for sharing !

Since you have it working now, please mark the thread as solved using the "Topic Tool" button so that other forum users may know a solution has been found :)

@raf924 thanks you very very much! i am going to test it out right now!

@Nick96
Ok, super. Good luck with the project.

Build and install QTerminal, then you can use it like other libraries

@SGaist

Thank you very much for your tips!
I probably should give up on the serial thread. It is beyond my ability to play with that problem.

@Leonardo said:

nections, the parameters must be of types that are known to Qt's meta-object system, because Qt needs to copy the arguments to store them in an event behind the scenes.
...
Call qRegisterMetaType() to register the data type before you establish the connectio

Wow, that really helps!

Thank you so much!

I will try it right now

@Jeroen3
Thank you for your sharing!

@Buttink If anyone comes across this problem. Apparently, the QLoggingCategory or the stderr/windows debugger are SUPER slow on windows. To fix this I used qInstallMessageHandler and wrote my own handler to not send to the terminal for windows. Now, my application runs just fine.

I added a delay function before reading the serial port,

console->SenDelay(70); QByteArray data = serial->readAll();

now everything is working.

@SysTech
Thank you for you reminding!