Re: suggestions for air temperature measurement

["AZ Woody" <Reply@xxxxxxxxxxxxxx>]

Sounds to me that 1-wire might be the way to go.  A two wire buss could
support the sensors, and a $20 adapter for the computer. (use a full cat 5
for distance, and to provide for expandability.)


Dallas provides some good sample code on their website for interfacing
Doing a "parasite" read on a sensor can be done on a single sensor in about
a second, Each sensor has a unique ID, and the bast part is, I've gotten
them for <$3 each in to-92 cases.  So, if you got 15 sensors, you can read
them about 4 times a minute if you want.  They're good to +/- 1 degree c or
+/- 2 degree C based on the specific sensor

You can build sw on windows and Linux for sure (those are the only two I've
done)

I'm currently monitoring temps in my HVAC system, outside temps, and even
have one mounted in a "can cooler" near my computer that will alert me if my
beverage gets too warm.

See homeauto dot usandthem dot com or email me at homeauto at usandthem dot
com

"Dennis Brothers" <mysurname@xxxxxxxxxxxx> wrote in message
news:3salisFm98cuU1@xxxxxxxxxxxxxxxxx
> "Marc F Hult" <MFHult@xxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:si00m1tnhuml6vnv6dp9lvhjsaq0q6blqi@xxxxxxxxxx
> >
> > Most home automation software is not well suited for logging analog
> > (continuously variable) data. I'd be interested in learning about
> > event-driven
> > HA software that also manages analog data validation, manipulation,
> > statistical
> > analysis, storage, retrieval and graphical presentation _well_ (before I
> > reinvent the wheel yet again ..)
> >
> > HTH ... Marc
> > Marc_F_Hult
> > www.ECOntrol.org
>
> You might check out HomeSeer and the mcs Temperature plug-in - it does
most
> of what you want; dunno if it meets your criteria of doing it _well_.
>
> I'm about to put a 1-wire temperature sensor in each room of my house,
then
> use mcs Temperature to gather data aimed at characterizing and optimizing
my
> heating system (I've also purchased five communicating thermostats that
will
> be controlled by HomeSeer).
>
>     - Dennis Brothers
>
>
>