Using rs-232 in a java desktop application

Hello all:

 

I am fairly new to the Java world and would like some advice on how to handle rs-232 communications with a Java based GUI I am working on.  Several years ago I created a similar GUI with Visual Basic, but my coding skills are a bit rusty and I never got the communication thing completely figured out.  I could send command strings easy enough, but I had trouble getting responses and processing them quickly.

 

The current GUI is to control an RGB lighting system.  It has some sliders, some radio buttons, and a few check boxes.  When the sliders move a command string needs to be sent out.  It will have to happen quickly so that the change in light level is smooth.  When the radio buttons and check boxes are clicked, single commands will have to be sent out.

 

I would also like to be able to handle any responses sent back from the controller.  When the sliders are moved, there will be a lot of comm traffic coming back to the GUI.  I sure this will require a buffer of some kind, but I am not sure how to set it up.

 

Once I get the rs-232 option up and running, I need to look at communicating with the light controller via an Ethernet connection.

 

Any advise or assistance would be appreciated.

 

 

Paul Stearns

Views: 481

▶ Reply to This

Replies to This Discussion

Permalink Reply by Nemanja Nesic - NEM- on May 27, 2011 at 4:52pm

While I am not expert with java <> serial port communication I can give you a few reference links:

First I'd start with:  http://www.oracle.com/technetwork/java/index-jsp-141752.html

Then take a look at:  http://java.sun.com/products/javacomm/reference/docs/API_users_guid...

 

dont hesitate to ask if you get stuck.

 

-nem

 

Permalink Reply by Paul Stearns on May 27, 2011 at 5:00pm

Thanks Nem.  I will check those out.

 

Paul

Permalink Reply by Paul Stearns on June 1, 2011 at 5:44pm

I took a look at some of the documentation and it seems that RS-232 is not supported for Windows apps anymore.  If this is indeed the case, then I guess I need to look at sending communications via Ethernet and using a converter to get it to the RS-232 device.

 

Any guidance on how to proceed would be appreciated.

Permalink Reply by Nemanja Nesic - NEM- on June 9, 2011 at 9:57pm

While that is true for sun libraries and support for Win, there are other 3rd party that you can use:

hope this helps

 

nem

▶ Reply to Discussion

RSS

Happy 10th year, JCertif!

Notes

Welcome to Codetown!

Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.

When you create a profile for yourself you get a personal page automatically. That's where you can be creative and do your own thing. People who want to get to know you will click on your name or picture and…
Continue

Created by Michael Levin Dec 18, 2008 at 6:56pm. Last updated by Michael Levin May 4, 2018.

Looking for Jobs or Staff?

Check out the Codetown Jobs group.

 

Enjoy the site? Support Codetown with your donation.



InfoQ Reading List

Vercel Expands AI Toolkit with AI SDK 4.0 Update

Vercel has announced version 4.0 of its open-source AI SDK toolkit designed for building AI applications in JavaScript and TypeScript. The update introduces key features like PDF support, computer use integration, and a new xAI Grok API.

By Daniel Dominguez

First Google Axion Processor Now Available: Claims Best Performance in Cloud Market

Google has announced the general availability of its C4A virtual machines, marking the debut of Axion-based instances. The cloud provider claims these instances deliver up to 10% better price-performance compared to the latest Arm-based alternatives from competitors, including Amazon Graviton4.

By Renato Losio

Netflix Rolls Out Service-Level Prioritized Load Shedding to Improve Resiliency

Netflix extended its prioritized load-shedding implementation to the individual service level to further improve system resilience. The approach uses cloud capacity more efficiently by shedding low-priority requests only when necessary instead of maintaining separate clusters for failure isolation.

By Rafal Gancarz

QCon SF 2024 - Why ML Projects Fail to Reach Production

Wenjie Zi of Grammarly addressed the high failure rates in machine learning at QCon SF 2024, revealing challenges from misaligned business goals to poor data quality. She advocated for a "fail fast" approach and robust MLOps infrastructure, emphasizing that learning from failures can drive success. Clear objectives and rigorous practices are essential for effective implementation.

By Andrew Hoblitzell

QCon SF 2024 - Scale out Batch GPU Inference with Ray

At QConSF 2024, Cody Yu presented how Anyscale’s Ray can more effectively handle scaling out batch inference. Some of the problems Ray can assist with include scaling large datasets (hundreds of GBs or more), ensuring reliability with spot and on-demand instances, managing multi-stage heterogeneous compute, and managing tradeoffs with cost and latency.

By Andrew Hoblitzell

© 2024   Created by Michael Levin.   Powered by

Badges  |  Report an Issue  |  Terms of Service