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PICList Thread
'X10 data n stuff'
1999\08\10@190431 by Rob Bakker

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Many thanks for your thoughts people,  but i would like to be able to
transmit data a little further down the powerlines than just to the next
pole transformer.  Anyone know of a device able to do this?

I have thought of:-
- something along the lines of X10
- modem/telecom but its would be too expensive to pay for a line only to use
it once a month..
- radio link ( 2.4 Ghz ) but this gets tricky to set up and it seems a shame
to waste all the bandwidth just to send data @ 2400bps from a PIC


any thoughts?

spam_OUTRobTakeThisOuTspamwaikato.ac.nz

1999\08\10@192848 by Craig Lee

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Read my earlier post on CEbus.  The technology is spread spectrum
over power line, but it has a physical layer spec. for RF transceivers
too.

If you go with 900 MHz spread spectrum tranceivers, you shouldn't have
much of a problem setting them up.

However, if you are only using it once a month, go with a two way pager
or cell phone and run it into a pic.  Research in motion has a great
OEM pager board and it's communication protocol is only 1 or 2 kilobytes
to implement.  http://www.rim.com

Craig



> {Original Message removed}

1999\08\10@193100 by l.allen

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> Many thanks for your thoughts people,  but i would like to be able to
> transmit data a little further down the powerlines than just to the next
> pole transformer.  Anyone know of a device able to do this?
>
> I have thought of:-
> - something along the lines of X10
> - modem/telecom but its would be too expensive to pay for a line only to use
> it once a month..
> - radio link ( 2.4 Ghz ) but this gets tricky to set up and it seems a shame
> to waste all the bandwidth just to send data @ 2400bps from a PIC
>
>
> any thoughts?
>
> .....RobKILLspamspam@spam@waikato.ac.nz
>
What about a pager, you can send limited info on message pager
accounts and one is only charged for the call, no rentals.
Ive toyed with the idea but never looked into the specifics.
You can even buy "freedom"cell phones that are ony charged per call,
no rental.

_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand
_____________________________

1999\08\10@193513 by Adam Davis

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www.rim.net/ perhaps?

-Adam

Craig Lee wrote:
{Quote hidden}

> > {Original Message removed}

1999\08\10@215002 by Vic Lopez

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Can't connect to this website.
-----Original Message-----
From: Craig Lee <cleespamKILLspamATTCANADA.NET>
To: .....PICLISTKILLspamspam.....MITVMA.MIT.EDU <EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU>
Date: Tuesday, August 10, 1999 5:23 PM
Subject: Re: X10 data n stuff


{Quote hidden}

1999\08\11@130114 by tmariner

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Hello Rob,

> - radio link ( 2.4 Ghz ) but this gets tricky to set up and
> it seems a shame
> to waste all the bandwidth just to send data @ 2400bps from a PIC
>
>
> any thoughts?
>
> RemoveMERobTakeThisOuTspamwaikato.ac.nz
>

However, slower symbol rate = better signal to noise ration = (longer
distance and/or more robust communications). I presume you are talking
narrow band?

Tom

1999\08\11@135949 by Julian Fine

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Why dont you try SMS on a cell phone
http://www.fine.co.za/eagle/cs.html

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