Multiple timers in single Application

[wysota]

Dear then suggest me one example with 6 timers with different slots with different timers and they should run at a time.

It's not a problem to have six timers and execute them in time. It's a problem when you are trying to do more than your machine can handle.

Here is a simple example that shows that you can have six timers in an app:

#include <QtCore>
 
class Dummy : public QObject {
  Q_OBJECT
public:
  Dummy(){}
public slots:
  void timeout() {
    QTimer *timer = qobject_cast<QTimer*>(sender());
    if(!timer) return;
    qDebug() << "Now is" << QDateTime::currentDateTime() << "timer id:" << timer->property("timerId").toInt() << ", interval is" << timer->interval() << "ms";
  }
};
 
#include "main.moc"
 
int main(int argc, char **argv) {
  QCoreApplication app(argc, argv);
  Dummy d;
  for(int i=0;i<6;++i) {
    QTimer *timer = new QTimer(&app);
    timer->setInterval(50+(qrand() % 200));
    timer->setProperty("timerId", i);
    QObject::connect(timer, SIGNAL(timeout()), &d, SLOT(timeout()));
    timer->start();
  }
  return app.exec();
}

#include <QtCore>

class Dummy : public QObject {
  Q_OBJECT
public:
  Dummy(){}
public slots:
  void timeout() {
    QTimer *timer = qobject_cast<QTimer*>(sender());
    if(!timer) return;
    qDebug() << "Now is" << QDateTime::currentDateTime() << "timer id:" << timer->property("timerId").toInt() << ", interval is" << timer->interval() << "ms";
  }
};

#include "main.moc"

int main(int argc, char **argv) {
  QCoreApplication app(argc, argv);
  Dummy d;
  for(int i=0;i<6;++i) {
    QTimer *timer = new QTimer(&app);
    timer->setInterval(50+(qrand() % 200));
    timer->setProperty("timerId", i);
    QObject::connect(timer, SIGNAL(timeout()), &d, SLOT(timeout()));
    timer->start();
  }
  return app.exec();
}

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The main concept of my app is through tcp/ip client - server App. in which my app is client & which always sends 1 telegram every 100ms using "update_HmiScrLvl4".

and the telegram construction & values will produced by the other timers, so dat the constructed telegram can be sent to server using "update_HmiScrLvl4".

You don't need any threads for that nor any (not a single one!) timers. You just need to use QTcpSocket properly.