Re: 1-Wire advice please

[Stuart Poulton <stuart.poulton@xxxxxxxxxxxxxx>]

Hi,

I produced some modules a while ago to do exactly this.

Here's some pictures of how Q installed and uses the modules.

http://www.awooga.nl/component/option,com_gallery2/Itemid,29/?g2_itemId=18916

http://tinyurl.com/2ok57m

Regards

Stuart


On Wed, 2007-01-24 at 09:59 +0000, kw1816 wrote:
> 1-Wire advice please
>
> I've just ordered my first set of 1-wire bits, the serial interface
> and 10 DS18S20's which should be arriving soon. My plan is to
> integrate it into Homeseer to provide temperature monitoring in each
> room in the house. I'm hoping that someone familiar with 1-wire
> networks can have a quick look at the following :
>
> Network:
> 1 run of unshielded CAT5e cable, daisy chained to each room from
> Node 0.
> When I install the cable I plan on pulling the cable to the end
> location and work backwards dropping a 6-8" loop through the
ceiling
> at each location.
> Does the open end need terminating in any way or just end with a
> DS1820 connection ?
>
> Sensor mounting:
> I plan to ceiling mount the DS18S20's in these
> http://cpc.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=EN55575
> For the physical connection to the network I was planning on using
> small choc block connector strips with the DS18S20 free on one side
> and the cable on the other side. Should fit nicely into the
> enclosure above.
>
> Watchouts:
> I've seen mention of fitting a 100 ohm pull up resistor to the
> DS18S20's - is it necesary on this size network ?
> Is the enclosure above a good choice - I'm not after total accuracy
> for the temperature reading but would like it to be representative.
> What other options exist for connecting and fixing the DS1820's ?
>
> Thanks
> Kevin W.