[Hai-users] http://www.ibuttonlink.com/

[Wijoyo Utomo]

I've successfully build temperature sensor based on Atmel
microcontroller and Dallas 18B20 temperature sensor. The sensor accuracy
is +- 0.5C from -10 to 85C. Google for the datasheet and you'll get the
communication protocol between the sensor and microcontroller.

HAI takes frequency input for both the temperature and humidity, no
specific protocol for the communication. freq = (degF*4)/30.

If you want to build the combined temperature and humidity sensor, you
might want to check Sensirion products.

Rgds,
W. Utomo

> -----Original Message-----
> From: hai-users-bounces at tssi.com 
> [mailto:hai-users-bounces at tssi.com] On Behalf Of The Litseys
> Sent: Thursday, January 19, 2006 9:45 AM
> To: Byron Peebles; hai-users at tssi.com
> Subject: Re: [Hai-users] http://www.ibuttonlink.com/
> 
> 
> Hello all,
> 
>     Here is the 64 million dollar question then...where can we get an 
> accurate sensor to read temperature and humidity that will 
> communicate with 
> the HAI controllers? If none are available...is it possible 
> to build one 
> that will interface with the HAI controllers? It may seem trivial to 
> some...but when the temperature and humidity readings from an 
> inexpensive 
> Radio Shack purchased unit are more accurate than the sensor 
> from HAI...it 
> sure makes very little sense. There has to be an intelligent fix...by 
> adjusting the current sensor or replacing it with something 
> else. Any input 
> from the engineer types here in the forum?
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Byron Peebles" <ByronPeebles at ieee.org>
> To: <hai-users at tssi.com>
> Sent: Wednesday, January 18, 2006 12:30 AM
> Subject: [Hai-users] http://www.ibuttonlink.com/
> 
> 
> > Has anyone experience with this temp/humidity/light/water sensor 
> > product?
> >
> > Although they have disclamers about perfect accuracy, they 
> seem pretty
> > cost-effective
> > and simple to install.  And the serial connection (and USB 
> software) for 
> > both Linux and
> > Windows makes it interesting to me.
> >
> > Seems like one single CAT-5 loop could do an entire residential 
> > building. Of course, I'm not suggesting this be used for 
> HVAC control, 
> > at least for temp, but it might have some value for 
> Occupiency tests, 
> > dark rooms, etc.
> >
> > _______________________________________________
> > HAI-users mailing list
> > HAI-users at tssi.com 
> http://romaine.tssi.com/mailman/listinfo/hai-> users
> > 
> 
> 
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