Re: OFF-TOPIC: HTML to send data out a certain port
On Mon, Oct 03, 2011 at 02:32:15PM -0500, Kent West wrote:
> Yes, off-topic, but you folks are the brightest group with which I'm
> affiliated ....
>
> We're thinking of building a Debian-based web-server that offers up
> a "remote control" interface for a smart classroom in a university.
> We want a web interface so it'll be universal (particularly working
> with mobile devices such as smartphones, iPads, etc.). This web
> interface would allow the the teacher to control the various
> multimedia devices in the room (projector, volume on the sound
> system, doc-cam, DVD player, etc) just by bringing up the web site
> on his Android phone, etc, and clicking hyperlink-type buttons. In
> this way he can power up the projector, tell the projector to show
> the signal from the laptop port in the podium or to switch to the
> image from the document camera, crank up the sound system volume,
> dim the room lights, etc.
>
> In order to do this, we have to convert the web clicks into infrared
> signals going to the various IR-enabled devices, essentially
> replacing the remote controls that came with the devices.
>
> Global Cache (http://www.globalcache.com/products/itach/models2/)
> has devices that, as I understand it, will send out the various IR
> signals to the various devices, based on ASCII commands sent to it
> via a wireless connection.
>
> My problem is how to convert a click on a web page into the proper
> code to be sent over the wireless network to the Global Cache
> device. I don't have the Global Cache yet to play with, but I'm
> trying to get a feel for how to do things before we start spending
> money. The API documentation from their web site indicates it's a
> matter of just sending the correct ASCII sequence out the web
> server's TCP socket on Port 4998.
>
> Here's a snippet from their documentation that might help set some
> background:
>
> >Commands are initiated by short ASCII string representing the
> >command type. Typically, physical address and data information
> >will follow. The structures of iTach commands are described in the
> >following sections. Text enclosed in brackets (<text>) must be
> >substituted by its ASCII definition. Multiple ASCII choices are
> >divided by separator ( | ) characters.
> >
> >Note: Commands are case sensitive.
> >
> >Example: The network settings are queried with the get_NET command:
> >
> >get_NET,<connectoraddress>↵
> >
> >where;
> ><connectoraddress> is 0:1 (network module address)
> >
> >The command ASCII string sent to the iTach is:
> >
> >get_NET,0:1↵
> >
> >Note: get_NET command is documented fully in section 5.1 below.
>
> Can anyone provide me a snippet of HTML (and/or related, such as
> php, etc) code for sending an ASCII string (such as the above
> "net_NET,0:1 <CR>") to TCP socket Port 4998?
>
> Better yet, can anyone also provide me a means of testing if I'm
> sending to that port without yet having the hardware in-hand? Like,
> if I manage to send data to port 4998, how do I know I sent it and
> what it looks like on the other side?
>
> And is this called "raw socket programming", or what? If I knew what
> terms to google for, I might not need to bother y'all any more.
>
> Thanks!
I think what you need is a web framework that lets you
process HTTP requests generated by a user clicking on links
submitting forms, activating buttons, etc.
Any modern scripting language will have suitable web
frameworks and socket communication
libraries to accomplish what you want.
> --
> Kent West<*)))><
> http://kentwest.blogspot.com
> Praise Yah! \o/
>
>
>
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--
Joel Roth
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