Re: Re: RS485 - XPL on the wire

["Mal Lansell" <mlansell@xxxxxxxxxxxxxx>]

Can't we just use the LAN?
Are there any ethernet-enabled PICs out yet?


----- Original Message -----
From: "Frank Mc Alinden" <fmcalind@xxxxxxx>
To: <ukha_xpl@xxxxxxx>
Sent: Friday, October 22, 2004 12:23 PM
Subject: Re: [ukha_xpl] Re: RS485 - XPL on the wire


>
> > 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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> >
> >
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>
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