Hi,

I installed the UPD library (cannot post link)

I found the link in the "official" listing of contributions here at processing dot org

According to its documentation and example,
(I wanted to post the links but there is this ridiculous restriction that doesn't let me do it as if this was to help avoiding spam - shame)
the following code put into the setup() method:
   udpserver=new UDP(this, 3002);
   udpserver.listen();
is supposed to open a UDP server socket and call the method
receive()
of the main application EVERY TIME an UDP packet is received.

Well, I did this, and the received() method only gets called once, when the first packet is received.
Then the socket stops listening.

I have verified it not only by putting a "print" in the receive function, but also by adding the following line to the draw() method:
 print(udpserver.isListening());
which prints "false" after the first packet has been received.

This is not the way it is supposed to work.
I even tried by calling the listen() method again after receiving a packet, that is:
 void receive (byte[] data) {
     //.... process received data
     udpserver.listen()
 }
but this way, the applet window never appears!!!
(I am receiving about 10 packets per second which is not much)

I can call the listen() method at every frame in the draw() method, but this will only ensure I will get one packet per frame (I tried it), so I will loose packets.

Can anybody explain me what's wrong and how to fix it???

Is there any alternative to this library in order to create a UDP receiving socket?

By the way, "udpserver" is obviously a variable I have declared at the beginning of my pde file as follows:
 UDP udpserver


Thanks in advance
m.

Thanks for sharing the tip!