[Twisted-Python] UDP + TCP + Serial

Sven-Erik Tiberg Sven-Erik.Tiberg at ltu.se
Mon Apr 30 06:40:39 EDT 2007

Thanks Werner.

Can be usefull in our project too, trying to connect a X3D ( Interactive
3D ) with mathworks/Simulink model over UDP. Simulink module done
runnning in RT-mode, X3D-model done, working on the UDP module to X3D.
Hope to have a shared interactive 3D viewer application readdy may 10

Sven-Erik Tiberg

-----Original Message-----
From: twisted-python-bounces at twistedmatrix.com
[mailto:twisted-python-bounces at twistedmatrix.com] On Behalf Of Werner
Sent: den 20 april 2007 22:29
To: Twisted general discussion
Subject: Re: [Twisted-Python] UDP + TCP + Serial

Might be that I have something useful for you - please see the attached
zipped code. Basic idea was to have a serially connected device
accepting commands and delivering status information connected to a
browser via a server delivering LiveFragments.

A few problems remain open, like:
   - how does one uniquely connect only one browser capable of sendign
commands (the SPS is a single resource)

   - are other browsers able to connect and do a status display only

Forgive me if I did did not use twisted/nevow/athenain in all aspects
correctly, but with lots of source/doc re- and rereading I was able to
bring it that far. If there are patterns I should avoid or correct I
will gladly do so if pointed out to me.

Thanks, Werner

Roel Schroeven wrote:
> I'm looking for a way to combine serial input with UDP (and possibly
> TCP) communication.
> Currently I have a very simple quick-and-dirty script using pyserial 
> and the socket module without Twisted that reads line-based data from 
> a serial port and sends it out using UDP. It works very well, but 
> functional and reliability requirements are growing and I'm looking 
> for a better design. New functionality that we'll need is connection 
> to a database, two-way network communication to control the program 
> while it's running, and perhaps the ability to use encrypted 
> connections for the output data.
> Twisted seems nice, but apart from a few simple hello-world-style test

> I don't have any experience with it. It doesn't seem too difficult 
> though, except for one thing: I can't find any concrete information on

> how to combine serial communication and network communication. What 
> reactor do I need? How do I initialize it? How can I make it listen to

> both a serial port and one or more UDP and/or TCP ports? I need to do 
> this on Linux, but it would be nice to have it working on Windows too.
> Many thanks,
> Roel

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