Recommendations for Room Temperature Sensors

[Hendrik W. M. van Eeden]

I have been interested in this one-wire thing for some time.  I am  
having a difficult time getting my arms around it.  So if others  
don't mind, I would like to keep this discussion on the list.
Thanks.

Henk

On Jan 2, 2007, at 3:33 PM, Mark Johannessen wrote:

> Bob:
>
> On 1/2/07, Bob Ober <rmober123 at comcast.net> wrote:
>> Mark,
>>
>> I am currently using 5 1-wire sensors to track temperature around my
>> home.  I use an applescript to read and record the temps.  As of  
>> today,
>> my temp reading is relatively reliable, as I have uncovered most (I
>> hope) of the weak spots in my programming.
>
> What specific 1-Wire sensors are you using?  Are they mounted in the
> rooms in an aesthetic way (working with SAF here)?
>
>> One drawback to 1-wire systems is that the sensors need to by  
>> polled on
>> a regular basis by the computer (I poll my sensors every 5  
>> minutes, but
>> you could do it on a shorter cycle).
>
> If there are a significant number of 1-Wire sensors using your system,
> do you think polling, say on a 1 minute interval, would be a problem
> in CPU usage that might cause delays in X4X activities?  The reason I
> ask is that I want to incorporate outside temperature and humidity
> sensing and possibly other sensors in the system and am looking for a
> solution that can easily expand.
>
>> The wiring is simple enough, and cheap, at least if you don't include
>> the cost of the computer.  The sensors run less than $5.00 each, and
>> cat-3 wire is cheap enough too.  Aside from the wire and sensors, my
>> system consists of an HA-7 controller and a USB-Serial converter.
>
> Can you give me more information on the HA-7 controller and USB-Serial
> converter you're using (make,model)?
>
> Mark J