Re: Record temperature to computer via serial port

["AZ Woody" <Reply@xxxxxxxxxxxxxx>]

Check into the Dallas one-wire devices.  You can get a 1-wire to serial (or
USB) adapter for about $20, and each device (sensor) is in the range of
$1-$2.  The wiring I use is cat3 or cat5, and multiple sensors can be hooked
to the same run (based on length, I wouldn't suggest more that 15-20).
Dallas provides demo code and drivers for windows and Linux, and the ones
I've used were written in C.  The app I wrote started as 1-wire only, but
I've since added support for x1-10 with a cm15a (version linux only).

The temp sensors I use are in to92 packages (look like a transistor), and
have a few located around the house.  You can find more info by googling
DS18S20 and probably find a bunch of sites with info (or DS18B20)

Check out homeauto dot usandthem dot com, in the section for the cm15a for a
bit more info, and a link to an email where you can reach me.

"Dave" <cheapscatedave@xxxxxxxxx> wrote in message
news:1154390860.610817.327050@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> Alex wrote:
> > Hi Everyone,
> >
> > With electric costs going so high, I want to start monitoring the
> > temperature in my home via the computer and see the best way to program
> > my A/C to come on and off during the day and at night.  I figure the
> > best way is to rig-up a temperature gauge to the computer via serial
> > port and write a small Linux script to take the temp and drop it into a
> > file with a time stamp.
> >
> > Can someone suggest such a device which would give me this information?
> >  I assume they are floating out there, but searching Google mainly
> > returned outdated pages for such devices (some going back to 1999) or
> > just plans on how to build one.  Though I don't mind building such a
> > device, I've never built something like this from the component level
> > before.
> >
> > Thanks for any suggestions or ideas on this ...
> >
> > Alex
>
> You may want to look into this:
> http://www.phanderson.com/tm127.html
> Dave
>