A simple UDP communications application

Sends/receives UDP packets using Matlab's Java interface.

Description

UDP packets are used to send data from one computer to another over a network or from one application to another within a single computer.

The judp.m program uses Matlab's ability to call Java code to enable it to send and/or receive UDP packets. One Matlab session can communicate with another Matlab session (on the same machine or over the network) or it can communicate with a completely different program (again, on the same machine or over the network).

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
TCP/IP Socket Communications in MATLAB

• MATLAB release: MATLAB 7.8 (R2009a)

[Jeff Barton]

The utility performs exactly as advertised, and is simple to use. (And very timely! It met my needs perfectly.)

The only issue I have noticed is that it (often) does not handle Ctrl-C breaks very gracefully... If I Ctrl-C during a call to judp() to receive a UDP message on a specified port, I can no longer receive on that same port. (I get a "cannot bind" error during subsequent calls to judp() on that same port.) Other than that, great submission!

[Adam Becker]

To quickly fix the Ctrl-C issue just add "socket.setReuseAddress(1)"

[Peter Manley-Cooke]

Very good. It all works and it provided me with a starting point for what I wanted to do.

[Tanyer Alan]

 

[Rahul]

Is it faster than the intrument control toolbox command UDP?

[Jveer]

 

[Kevin Bartlett]

@Rahul--judp.m is really not that sophisticated a program, so I suspect it is slower than the equivalent command from the Instrument Control Toolbox. The trouble with the Mathworks' UDP/TCP communications programs is that they ARE sophisticated--they may be fast and highly flexible, but they are also very complicated to use (they are also considerably more expensive than judp.m).