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No, all 7 nodes would be connected to the same
three wire bus network, and at one end of this network the three wires
which
make up the RS485 network, are converted into RS232, which then plugs into
the
serial port.
like this
NODE 2
NODE 1
RS485/232========PC
I I I
I I I
I I
I
------------I--I--L-----------------------I--I--L---------------------I--I--I
------------I
L--------------------------I---L-----------------------I--I
------------L-----------------------------L--------------------------I
do you see what I mean?
Havnt got time at the moment to do a proper
drwaing
with paint, but I hope that shows what the network would be
like.
HTH
Steve
----- Original Message -----
Sent: Friday, July 19, 2002 1:44
AM
Subject: RE: [ukha_d] IR systems, the
choices
So,
if you want to have 7 zones (rooms), where do you connect them
to?
7
serial ports?
Nik
>How your
system topology looks like? You connect all the Tx/Rx units
into
>your
IR controller, I suppose, and then connect your controller via
serial
>port to PC. Is that right?
>
>>>>Yep
pretty much as I see it. They are all separate nodes on a 3
wire
>RS485 network which goes back to the computer to do most of the
work, this
>enables easy programming of them so you don't have to
reprogram each PIC
>chip, which would take a while, and need good
coding skills in C.
This mystical controller does not exist unless
you consider the PC as it.
All the units are standalone (you need two to
make anything happen though)
and when connected to a PC will become a
very powerful system - or that's
the plan anyway.
All my stuff is
programmed in assembler!! Only the PC app will be high level
e.g.
VB
Well said on the rest Steve.
Ian
B
>-----Original
Message-----
>From: Steve D
[mailto:steve@xxxxxxx]
>Sent: 18 July 2002 09:48
>To:
ukha_d@xxxxxxx>Subject: Re: [ukha_d] IR systems, the
choices
>
>
>----- Original Message -----
>From:
Nikola Kasic
>To: ukha_d@xxxxxxx>Sent: Wednesday, July
17, 2002 11:57 AM
>Subject: RE: [ukha_d] IR systems, the
choices
>
>O.K.
>I've got the picture. That means that
you
can even convert signals if you
>have 3 Sony TVs so you can send for
Lounge Panasonic code for Volume+ and
>your system will convert into
Sony Volume+ and send in Lounge only. If you
>send Sony Volume+ it
will not convert it but send to bedroom only. If you
>send Grundig
Volume+, it will be converted into Sony Volume+ and send
into
>Bedroom
2 only. For source, you'll need ideally, something like
Pronto.
>
>>>>You will be able to script the commands
based on events, say if
>you had a
>sony tv in the bedroom, and
you where in the bedroom and you put the volume
>+ the RX part of the
unit would pick this up and then do nothing,
>as you are
>using
the remote for the tv in the room, so you would not want this
command
>sent else where. A pronto would be the best option to
control
each item
>individually from one location.
>
>Now, my
question is how many wires you need for Tx, and how many
>for Rx?
You
>are talking about Tx/Rx units, so it seems like a single
unit.
>
>>>>It is on a BUS network, so you need three
wires going into the unit, and
>three wires coming back out, also you
need 12 power to it, so
>thats an extra
>two
wires.
>Which
totals 8
>
>Will then single Cat5 be enough for connecting
it?
>
>>>> Yes, all patched back to a central location
the right wires
>connected up
>so it's in a bus configuration
and they have power, and one end of the BUS
>(three wires) being
connected to a RS485 to RS232 convertor to a pc to
>control the
scripting.
>
>How they must be placed to prevent
looping?
>
>>>>>They have inbuilt protection for
this (or they will) and it is all
>scripted, so in theory you can
protect it yourself using timers.
>
>Where can I find those
Tx/Rx units?
>
>>>> Ian B is building and designing
them himself, they are not off the
>shelf, and are a unigue specif
design to accomadate the indvidual
>addressing
>ofr each TX/RX
combo unit.
>
>A saw them in many shapes on pictures on
people's
web sites. I
>would like to
>know if they can be flush mounted
in an switch box, so I can put cable in
>place and cut boxes and
cover
them with blank faceplates, until I get Tx/Rx
>units?
>Where
can
I buy them anyway? I see that they are mostly homemade.
>Can I
find
>finished products anywhere?
>
>>>>>See
above
>
>How your system topology looks like? You connect all
the Tx/Rx units into
>your IR controller, I suppose, and then connect
your controller via serial
>port to PC. Is that
right?
>
>>>>Yep pretty much as I see it. They are all
sepereate nodes on a 3 wire
>RS485 network which goes back to the
computer to do most of the work, this
>enables easy progamming of
them
so you don't have to reprogram each pic
>chip, which would take a
while, and need good coding skills in
C.
>
>Cheers,
>Nik
>
>
>>>>>>HTH
Steve
>I am sure Ian B can correct me if I have got any of this
wrong.
>
>
>
>For more information: http://www.automatedhome.co.uk
>Post
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