Solved

web based controll of rs232 and sending rs232 codes from a web page

Posted on 2004-10-04
3
469 Views
Last Modified: 2008-03-10
I want to make a web based controll that has buttons and when I click a certian button, it sends its corosponding code to a particular com port.
My first experiement will be to try to controll my benq 8700 projector via its rs232 port. I have already aquired the 8700 rs232 controll codes from benq.
now I just want to make a web based front end that will run on the computer that is connected to the 8700.

Any and all help will be greatly appreciated.

I am sure that many others could learn from this post after it gets some 'seasoned' answers.

-Jon Colby
0
Comment
Question by:joncolby
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 6

Expert Comment

by:Leviter
ID: 12224167
There are a couple of ways you can achieve this, but none are 'straight off the shelf'. It cannot be done directly, but you can either:

* Make an applet that connects to a 'service' that interprets commands sent from the applet to the service, which in its turn writes commands to the RS232
* Create a cgi script that interprets the commands given from the browser and puts commands over the RS232

Remember that when you create such a thing, that there will be some network latency... so your commands will not be processed right away!
0
 

Author Comment

by:joncolby
ID: 12224223
how do I create a cgi script to do that ?
0
 
LVL 3

Accepted Solution

by:
gnudiff earned 500 total points
ID: 12284734
I am sorry for the unhelpful answer, but you really will simply need to learn some programming for that. :)

but basically, if you want to control the projector remotely, you need 3 things:

1) program interface to the com port - something that lets you afterwards say:
- send to this benq this code.

2) program interface to the client - either via a web or i don't know what else. probably the web is the all-around easiest solution. something that lets you say:
- okay on this web page i want to have user to be able to turn on/off projector, change this or that parameter;


3) program the controller on web-server side, which gets the commands passed by client and translates them into the commands to the COM port.
- when user selected "turn off projector" on page, i will send to the benq the command "PROJ_OFF" via RS232 (or whatever the command codes are).

0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I will show you how to create a ASP.NET Captcha control without using any HTTP HANDELRS or what so ever. you can easily plug it into your web pages. For Example a = 2 + 3 (where 2 and 3 are 2 random numbers) Session("Answer") = 5 then we…
SASS allows you to treat your CSS code in a more OOP way. Let's have a look on how you can structure your code in order for it to be easily maintained and reused.
The viewer will receive an overview of the basics of CSS showing inline styles. In the head tags set up your style tags: (CODE) Reference the nav tag and set your properties.: (CODE) Set the reference for the UL element and styles for it to ensu…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question