OMNET++: How to create a timer event that fires on each second?

Question

I am using OMNET++ with INET Framework 4.0. How can I create a Timer in my custom Mobility Module to fire at each second so that I can move my AdhocHost every time my timer event fires?

Answer 1

In OMNeT++ self-messages are timers.
To achieve your goal you should create a cMessage object, schedule it using scheduleAt(), then in handleMessage() reschedule it every time when it expires.
For example:

// somewhere in simple module class declaration (*.h)
simtime_t timerInterval;
cMessage * timer;

// in initialize()
timerInterval = 1.0; // one second
timer = new cMessage("one second timer");
scheduleAt(simTime() + timerInterval, timer);

// in handleMessage()
if (msg == timer) {
   // do something

   scheduleAt(simTime() + timerInterval, timer);  // rescheduling
}

// in finish()
cancelAndDelete(timer);

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By the way: there are a lot of examples of using self-messages in OMNeT++ samples, especially in Tictoc.