Re: Re: RS485 - XPL on the wire

["Frank Mc Alinden" <fmcalind@xxxxxxxxxxxxxx>]

> I also found this:
> http://caraca.sourceforge.net/

Im not 100% sure but i think that Canbus is suited to txing / rxing small
data packets

> Indeed, the original intention was xPL on RS485..since xPL already
> has addressing. I took a rather simplistic view that in HA you could
> afford a few collisions and that devices aren't transmitting very
> often. It was also only around simple devices like light switches,
> temp sensors, etc.

Would be nice to have it work like cbus were theres no master.......

Frank


----- Original Message -----
From: "g8kmh" <lehane@xxxxxxx>
To: <ukha_xpl@xxxxxxx>
Sent: Friday, October 22, 2004 9:15 PM
Subject: [ukha_xpl] Re: RS485 - XPL on the wire


>
>
> Indeed, the original intention was xPL on RS485..since xPL already
> has addressing. I took a rather simplistic view that in HA you could
> afford a few collisions and that devices aren't transmitting very
> often. It was also only around simple devices like light switches,
> temp sensors, etc.
>
> Others have mentioned DMX/DMX512 and I think there is a great case
> for an xPL to DMX interface to drive dimmers.
>
> I also found this:
> http://caraca.sourceforge.net/
>
> Lehane
>
> --- In ukha_xpl@xxxxxxx, "Mal Lansell" <mlansell@f...>
wrote:
> >
> > > Hi All,
> > >
> > > http://www.hth.com/easytap/default.htm
> > >
> > > May be of interest.......
> > >
> > > I've alsways thought that RS485 was mainly about the
"hardware"
> layer.
> > >
> >
> > It is, but I think the OP wanted a method for transmitting xPL
> messages over
> > RS485, as opposed to something like DMX, where xPL would be used
> (by a PC
> > application) to drive a DMX controller that then sends DMX
messages
> over the
> > RS485 connection.
> >
> > For sending xPL over RS485, we get to define our own unique
system,
> although
> > in the absence of a definite application or hardware for this,
it's
> hard to
> > say whether RS485 or some other network (such as CAN or Ethernet)
> would be
> > more appropriate.
> >
> > Mal
> >
> >
> >
> >
> >
> > > SNAP,  http://www.hth.com/snap/ which I know
many are aware of,
> is one
> > > protocol that can sit on RS485, as indeed is DMX512
> > > http://www.dmx512-online.com/physl.html
, if I've got this wrong
> feel free
> > > to take me into a dark corner and tell me so.
> > >
> > > Regards
> > >
> > > Stuart
> > >
>
>
>
>
>
>
> xPL Links: http://www.xplproject.org.uk http://www.xplhal.com
http://www.xpl.myby.co.uk
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