Once again 18F6720 and the Embedded Internet

[LITTLE JON]

The whole kit includes two example programs, and one of these is a small WebServer which displays the current A/D readings, using a C function for "writing" on the Web page.

Is there any function to "read" from the Web page(eg: If I press a toggle button in the Web page the PIC will iluminate a LED)

Sorry if my English is not so good.

THANX

[PCM programmer]

CCS may have additional example files (perhaps in pre-release stage)
that they don't put on the CD-ROM that comes with the kit.

You should email CCS tech support and ask them about this.

[Ttelmah]

It would though be very difficult to do 'as described'. Much easier, if this is a server, feeding data 'to' you, to not have a web page as such, but a simple text file in comma deliminated form, that can just be fetched, and parsed. If it also has to be available for human viewing, then have a web page, that displays the contents of this file, at a different address.

Best Wishes

[Mark]

It sounds like you are describing what the CGI scripts are doing.

[Ttelmah]

Far easier to have a dedicated script returning a value, than to try to 'read' the value out of a human readable page (which seems to be what was being asked for). The former would be very 'specific', and I doubt if anybody would have written code to do this.
However some sites are configured so that while you can generate a 'page', you cannot generate your own scripts. On these, the easiest way would be to not have a 'page' as such, but a ftp entry containing the required data in text form, It was this that I was suggesting.

Best Wishes

[Mark]

[Ttelmah]

It seem to me that this is what he is asking for. In other words the ability to respond to a 'remote' event on another page. If he only wants to update the local page, then obviously this is easy.

Best Wishes

[LITTLE JON]

What we are trying to do is what Ttelmah describes:to have the ability to respond to a remote event, but not on another page, but on the PIC's supported page.

Unfortunately, we are just students of electronic engineering, and many of your responses are difficult for us to understand.

We will maybe try doing something easier: using PHP we will try to send an empty text file with a name that can be recognised by the PIC(eg:"turn_the_light_on.txt")the PIC is allways looking for this file, and when it finds it, the light will be turned on.

The question now is this: Is this PIC able to support PHP?
I think this is an acceptable solution, but is there any solution more simple?

THANX TO EVERYONE FOR YOUR REPLYS

[asmallri]

Take a step back and reexamine the overall problem.

Do HAVE to use a web interface?

Can you just send a UPD packet to the PIC?

It is much easier for a PIC to service UDP requests as they require very little CPU resources compared to having to run a HTTP session on top of TCP.
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!

[Mark]