On Sun, 18 Jun 2000, fernteix wrote:

> I already know how to interface  sensors and a motors to a PC using the
> serial or parallel port.
> I would like to learn how to do the same but  over the internet.
> My question is about how difficult it is: the use of some software or is a
> complex matter. What matters I need to study?
> Please give me any links or the right keywords for searching.
> Many thanks for your help.

Fernando,

There are a few ways to do this.  Seiko makes a single chip TCP/IP
controller you can use; emWare is software you can use on a PC gateway to
give you access to a PIC via the Internet.  Several of us are also working
on developing various combinations of IP, UDP, TCP, and ICMP for PIC
applications to use the PIC directly.  And I know at least one person is
working on an Ethernet implementation as well.

I have seen source code for two PIC HTTP servers, and a web page for a
third that I suspect may be bogus -- at least I really, sincerely don't
believe that they've done all they say they have in the hardware they
claim to have used.

Lastly, there should shortly be a new Web site, OpenPIC.com, where a bunch
of people will be working on this sort of thing.

http://www.rmbeales.fsnet.co.uk/
http://www.emware.com/

I can't find my link to the other HTTP server code, but it's not hard to
find links to if you look through the Pic webring.  Also check the PIClist
archive for June, there's a whole topic thread about this - search for
"emWare", I think.

Dale
---
The most exciting phrase to hear in science, the one that heralds new
discoveries, is not "Eureka!" (I found it!) but "That's funny ..."
                -- Isaac Asimov