Re: DMX and xPL

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

Hi Lehane

> Now, that kind of breaks the xPL schemas since a switch should use
> sensor.basic - is it 'legal' for a switch to issue a control.basic
> command as well as a sensor.basic trigger?

You can still operate lights based on the sensor.basic trigger...Just need
to write a Deteminator to watch for the sensor.basic trig message........

At this point in time i dont think i will look at the  dmx stuff ....not
enough interest ....if i didnt have cbus lighting i would have a
go...........

Would be nice to have a hardware interface for xPL to
Cbus....????....Wonder
how difficult it would be ....??.....The main issue her would be getting
the
protocol from Clipsal..........

Frank






----- Original Message -----
From: "g8kmh" <lehane@xxxxxxx>
To: <ukha_xpl@xxxxxxx>
Sent: Tuesday, October 26, 2004 4:54 AM
Subject: [ukha_xpl] DMX and xPL


>
>
> There does seem to be a lot of DMX information and equipment about.
> So it would seem a good starting place for lamp dimmers, which at a
> low level is probably one of the more useful HA functions. There is
> the schematics and code for a PIC at
> http://www.geocities.com/ph_zone/Digi_Pack/Digi_Pack.html
and this
> could be extended to more channels easily, as well as ditching some
> of the other features. Secondhand units also seem to be reasonably
> available at lower prices per channel than C-BUS.
>
> Philoshically it would be ideal to extend xPL onto dumb devices. A
> couple of downsides to a PC based parser revolve around the fact that
> a light switch (say) will need to send a message to the parser and
> then the parser (or script/determinator) will resend it back out. No
> PC, software or microcontroller = no lights. With xPL on the, say,
> CAN bus then a switch could be configured to send an xPL command to
> the lounge lights also on the RS485/CAN bus but also picked up by the
> PC interface and used to run scripts, etc. Yes, the switch would need
> enough smarts to be able to be configured but that's not too tough.
> Now, that kind of breaks the xPL schemas since a switch should use
> sensor.basic - is it 'legal' for a switch to issue a control.basic
> command as well as a sensor.basic trigger?
>
> CANbus does start to look attractive and vscp or yasp as the low
> level protocol, although I'm sure there are others!
>
> The reason for the original point was that we're doing major building
> works and an extension next year so have a clean slate. X10 isn't on
> the shopping list :)
>
> Lehane
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> xPL Links: http://www.xplproject.org.uk http://www.xplhal.com
http://www.xpl.myby.co.uk
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