RE: Linet Network Nodes

["Des Gibbons" <des@xxxxxxx>]

> I am currently working on a hardwired system using tcp/ip over 10
mbit
> ethernet and using PIC micros for the device interface cards. Not
much
> use to you now as god knows when it will be ready :) "
>
> There seem to be quite a few people "in the middle of
designing" RS485,
> TCP/IP etc hardwired systems.  I guess because volumes aren't
around to
> make commercial ones cheap enough (and the volumes are never going to
be
> there I expect).  The attraction of the Linet silicon was that it
gave a
> DIY approach a fair headstart and it looked simple.  Downside is
that it
> is *very* proprietry.
>
> Where are you exactly with the TCP/IP solution ?

Absolutely nowhere near anything that would be useful if you are building
at
the moment!

btw, where are you building?


(I thought I saw John
> Tankard's site also talk about a TCP/IP approach ?).  One nice
thing
> about such a solution would be that one could remove the dependency on
a
> controller.  I have been thinking that if distributed switch
nodes could
> detect the presence of a controller then by all means pass
"switch"
> messages to it to decide on what to do with them, however if the
> controller wasn't detected, off line etc then a default action could
be
> implemented talking directly to the controlled node.

Indeed if you have a tcp/ip lightswitch that sends a dim command to a
tcp/ip
lighting relay board, it doesn't matter if the controller is online or
not.

  Of course there
> seems to have been numerous discussions from DIY's about such
system
> design .....  I am sort of stuck between just buying a complete
package
> and have it work against putting in some design effort to roll my
own.
> However being an electronic design engineer I know how long such
designs
> can take to implement - hence the appeal of the Linet system.

First thing to consider, what do you want to do now, and what do you want
to
plan for later.

Have you got any prices from linet for their products?

I hear what you are saying about the roll your own, the problem with a
colaborative effort is that everyone has different priorities and
feature
lists.

>
> Thanks for the advice on CAT5 installation !

Don't thank me, thank all the people who thought they had put enough in
(
Cue JamesH )

Des

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