Real Time Data on Web Server

[GaDawg]

I am using an industrial interface controller that contains real time data such as flow rates and pressures. I am new to web development and this interface is also a web server. I am able to display the data using SSI and CGI commands in the web pages I create on the server. I'm using commands like: "Flow Rate = <!--#exec cgi="/get_device.fn D101"--> GPM" but the only way I've been able to display updated data is to do an auto-refresh of the page. Very inefficient. Is there a more efficient way I can display this data as a real time component?

Thanks,
GaDawg

 

[xwb]

By auto-refresh do you mean kick off a timer which then does the refresh for you?

Have a look at AJAX on the web - it is a technique that will enable components on the form to be updated without the whole form being updated.

 

[richs]

Hiya-

There are java (not javascript) applets out there that
will continuously update the display. I don't have much
experience with them, so I will not comment on their use.

For me, I've been able to do an auto refresh from the
<meta> statement that will update it in real enough time
for my applications. Usually 10-15 seconds is close
enough for my use.

Let us know what you come up with. I'm sure that there
will be plenty of interest in your solution.

Cheers,

Rich S.