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

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 -07. BG Sven-Erik Tiberg -----Original Message----- From: twisted-python-bounces@twistedmatrix.com [mailto:twisted-python-bounces@twistedmatrix.com] On Behalf Of Werner Thie 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