RE: Re: OT: Device control and status display using Pocket IE

["Ward, David" <David.Ward@xxxxxxx>]

Thanks Patrick,

Kieran also suggested xAP ;-)

It may give me achance to play with xAP in work time :-)

Dave



-----Original Message-----
From: Patrick Lidstone [mailto:patrick@xxxxxxx]
Sent: Wednesday, July 30, 2003 3:06 PM
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: OT: Device control and status display using Pocket
IE



> My problem is implementing a 'real time' status display via simple
HTTP or
> Java script,  update at say once per second.
> We need to be able to display some very simple parameters, status,
> temperature etc.  as a dynamic display that updates in the browser
window.
> I'd like to keep flicker/refresh to a minimum so I don't really
want to
> update the whole page.
> My first thoughts are to update a 'status' frame, or to use Java
script to
> fetch values from the web sever by intercepting requests for
specific
> pages/CGI.
>
> Anyone got any thoughts or preferably and code examples so that I
can show a
> proof of concept to the guy's that will eventually implement this?

HTTP really isn't the right tool for the job in this environment IMO -
it doesn't do any form of push very well.

I've written a xAP active X control for PPC, which can be used with
Embedded VB (which is a free download from MS) to effect bi-
directional, real-time control. Unfortunately it's not very stable,
but it might be worth a look. Even if you didn't go the xAP route,
you should be able to hack together something in VB using
conventional sockets which will have much better usability than a
browser based solution.

Patrick



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