Qt MQTT and while loop

[Guigiidre]

Hello!

I' m using Qt Mqtt on Windows and I have troubles to publish a message in a while loop.

For example:

    int n=0;
    while (n<5){
        qDebug()<<Q_FUNC_INFO<<endl;
        mClient->publish(QMqttTopicName(topic.toString()),data.toByteArray());
        Sleep(20000);
        n++;
    }

with this code, publishments are all made at the same time and after exiting the while loop. But this is not what I want, I would like a publishement every 2 seconds during the execution of the while loop.

Thank you in advance for telling me how to achieve this.

guigiidre

[SGaist]

Hi and welcome to devnet,

You are blocking the event loop which explains what is going on.

A QTimer would likely be a cleaner approach. Let it timeout 5 times and then stop it.

[Guigiidre]

Great, it works, Qtimer was the solution.
Thank you!