On Sun, 3 Oct 2004 10:19:41 -0400, "Mark" <replyToNewsgroup@null.cz>
wrote:

>  I know how to do
>that, but the temperatures corresponding to 0 and FFFFFF counts are not
>described anywhere.

Then you have to do it yourself.

Take a calibrated thermometer, put into a cup of cold water and also
insert your sensor into it. Note the reading on the calibrated
thermometer as well as on your digital system. 

Repeat the test in a cup with hot water.

From this, you can calculate the required scaling, assuming that the
sensor responses in a linear manner. If not, you have to repeat the
test in many more temperatures, plot the results and try to fit a
higher degree curve between your measurements.

Paul
 

Hi,

I am hoping to convert a RS wireless thermometer (model 63-1030 )  into a
thermostat, by interpreting the received data and processing it in a
separate micro.    Has anyone got any details on the protocol or code they
could share?

I found a bit of information in this article :
www.tinaja.com/glib/muse151.pdf   but  I'm hoping someone may have some info
on how to scale the data and convert to engineering units.  I know how to do
that, but the temperatures corresponding to 0 and FFFFFF counts are not
described anywhere.

It's too bad Radio Shack didn't add a few more features to make a wireless
thermostat, as they sell for much more than this $49 USD device.

Thanks

Mark




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.772 / Virus Database: 519 - Release Date: 10/02/2004