Re: Electronic Wizards

[Lehane Kellett <lehane@xxxxxxxxxxxxxxxxxxx>]

There are two problems with RS485 (and CAN to some extent) for DIYHA.

The first is that you generally have to create the hardware and doing
this past
prototype level, say if you want 10 in the house, is very time consuming.
There are all sorts of hardware available off the shelf but try fitting
them in
a UK back box or the costs are higher than Ethernet.

Secondly you'll need to (re)-invent a protocol layer(s) and/or an
application
layer and a bridge into whatever the main HA system is - assuming you
want integration.

Using off the shelf Ethernet hardware together with  xAP or xPL makes
for a plug and play system at  c.50quid a unit, which unless you have lots
of free time, is cheap.

Lehane

Dan Ward wrote:
>
> of course, I was forgetting RS485 would be very easy to implement and
> would happily use your cat5 wiring, I have wondered about it before my
> self.
>
> Another ethernet alternative would to be to use a site player module.
> There is a yahoo group for them, and they are fairly cheap.
>
> Dan
>
> Lehane Kellett wrote:
> >
> > Something like
> > http://www.honeycot tage.mm-wave.
com/xaplcd. htm
> <http://www.honeycottage.mm-wave.com/xaplcd.htm>
> > <http://www.honeycot tage.mm-wave.
com/xaplcd. htm
> <http://www.honeycottage.mm-wave.com/xaplcd.htm>>
> >
> > There's a 128x64 touch version on the way.
> >
> > Lehane
> >
> > Chris Hunter wrote:
> > >
> > > 'sounds just what we're after, too ...
> > >
> > > Chris
> > >
> > > Chris Miles wrote:
> > >
> > > >Have any the electronics guys ever thought about
developing a
> > > ethernet module with a small LCD display
> > > >that can be plugged in anywhere in the house and
displays network
> > > information / current channel being
> > > >sent down to the tv / music titles being transmitted via
FM to home
> > > stereo systems etc.
> > > >
> > > >Or maybe even using CAT5 medium to send power and a
parallel
> > > connection down to the display?
> > > >
> > > >Chris
> > > >
> > > >
> > >
> > >
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15/09/2006
>



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