Re: NOW: 1-wire weather (WAS: Household temperature sensors)

["Quinten Uijldert" <yahoogroups@xxxxxxx>]

> >> Would it just be a simple case of running
> >> some cat5 to each additional DS1820 (in a star topology)
?  Or does it
> only
> >> work if you use one cable to connect all sensors on ?
>
> It should work either with one cable or with a star topology and
the
cables
> linked together at the master (i.e. computer).  It's really a
case of suck
> it and see, you may get some reflections that cause problems. 
There are
> way round this, Maxim do a pdf document about the different topologies
and
> how best to set them up, link below.
>
> http://pdfserv.maxim-ic.com/arpdf/AppNotes/app148.pdf
>
> Hope that helps.
>
> S.

That certainly helps :o)

Do you know if it is possible to have both the from and to wires in a
single
cat5 cable (i.e, PC -> sensor 1 -> PC -> sensor 2 -> PC ->
sensor 3) ?  This
would make it appear to be a star, but is really a linear topology.

Q.



http://www.automatedhome.co.uk
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