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🔌General Home Automation => Automating Your House => Automated Home Showcase => Topic started by: pconroy on June 29, 2010, 07:01:35 PM

Title: My inexpensive approach to temperature monitoring...
Post by: pconroy on June 29, 2010, 07:01:35 PM
Well, relatively inexpensive.  :)

I bought two of these devices: http://cgi.ebay.com/PC-Notebook-Laptop-USB-Thermometer-Temperature-Recorder-/250388256032?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item3a4c4d9520#ht_3619wt_910


One USB based and one that has a USB/RS232 chip embedded in it: http://www.pcsensor.com/index.php?_a=viewProd&productId=28


I found the RS232 device incredibly easy to program; the USB device required a little Googling to get it running on Linux.   

I've got one monitoring a room temp on the first floor, pretty conventional usage.


The other one, I think I got a little creative with -- I used a USB extension cord and ran it up to some HVAC ductwork that passed right by my server room.  I just wedged the sensor into the ductwork and have it check the temps every 2 mins.  This is the way I'm watching my furnace (in the winter, central A/C in the summer) cycle.

I write all the readings to a database and have been using them to guesstimate the effectiveness of some of the lifestyle changes we're putting in place.


 Just thought I'd pass that along!
Title: Re: My inexpensive approach to temperature monitoring...
Post by: Brian H on June 29, 2010, 07:35:06 PM
Thanks for sharing your find and how you are using it.  >!
Title: Re: My inexpensive approach to temperature monitoring...
Post by: HA Dave on June 29, 2010, 09:25:27 PM
I bought two of these devices: http://cgi.ebay.com/PC-Notebook-Laptop-USB-Thermometer-Temperature-Recorder-/250388256032?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item3a4c4d9520#ht_3619wt_910

Very cool. I didn't even known there was such devices! 
Title: Re: My inexpensive approach to temperature monitoring...
Post by: Oldtimer on June 30, 2010, 07:53:24 AM
Nice gadget!  Thanks for sharing.
Title: Re: My inexpensive approach to temperature monitoring...
Post by: Charles Sullivan on July 01, 2010, 09:28:06 AM

pconroy:
If you like, you can feed the temperature data into Heyu with the emulation module type ORE_TEMU.

Title: Re: My inexpensive approach to temperature monitoring...
Post by: pconroy on July 01, 2010, 02:02:48 PM
Charles..

Cool - I didn't know that?!?!?

Thanks!
Title: Re: My inexpensive approach to temperature monitoring...
Post by: Charles Sullivan on July 01, 2010, 08:53:33 PM
Charles..

Cool - I didn't know that?!?!?

Thanks!

See section OREGON SENSOR EMULATION in man page x10oregon(5) for details.

Why not repost your message on the heyu_users forum (perhaps with some details about configuring the USB device).  I'm sure the folks there will appreciate it.
Title: Re: My inexpensive approach to temperature monitoring...
Post by: jlp on July 30, 2010, 07:02:08 PM
With visual basic 2008 express it is possible to send signals X10 based temperature setpoints. I am currently designing an application to control my air conditioner.

 
Title: Re: My inexpensive approach to temperature monitoring...
Post by: oeginc on August 20, 2010, 07:39:53 AM
Just a suggestion, make sure the USB extension is a plenum cable or you could run into trouble.  Non-plenum cables are not intended to run in any space designed for breathable air-flow (Ie: HVAC duct work, return air vents, etc).
Title: Re: My inexpensive approach to temperature monitoring...
Post by: pconroy on August 20, 2010, 12:09:16 PM
Good advice!

In my case, the sensor is on the outside of the duct and is never in the airstream but that's an important warning!
Title: Re: My inexpensive approach to temperature monitoring...
Post by: kameron on September 04, 2010, 09:09:01 PM
Very CooL!!. Thankz For Info!!
Title: Re: My inexpensive approach to temperature monitoring...
Post by: Mellowmark on September 06, 2010, 10:27:43 AM
The plenum rating is for safty if there is a fire, it will not produce harmfull smoke.
Title: Re: My inexpensive approach to temperature monitoring...
Post by: shake on November 18, 2012, 01:28:58 AM
How did you run the first sensor? How long was the USB run? I have my server in my office but would like sensors like this in more appropriate spots. I'm worried that using multiple extension cables will cause too much resistance. Thanks.