Wireless temperature sensor

[chilly_charly]

I'm looking for a cheap solution to build a temperature monitoring network at home (6 sensors) . Of course this project was not planned when the house was built 25 years ago and, for obvious reasons, a wireless system is now highly recommended 😉

I'm sure that some of you have already developped similar projects. Could you advise me ?

[Mathieu_R.]

Hi Chilly Charly,

I guess 'cheap' means that the WSN do not apply for your home use, right?

I've worked with some 1-Wire temperature sensor - wireless? Okay. If you want build your own sensor network, this kind of sensor uses digital signal and can easely be interfaced with a µC (no need of ADC).

About Wireless communication, I can tell you that WSN rely on ZigBee layer. Perhaps you can find components and/or examples of circuits that use this technology.

Best regards,

[GerdW]

Hi Charly,

have a look at this!

Those sensors are not really wireless, but they only need to be plugged in once in a while... And they start from $49!

[RTSLVU]

I would say the cheapest would be to start with one of these WMR-100N weather stations

http://www2.oregonscientific.com/cat-Weather-sub-Professional-Weather-Stations-prod-Pro-Wireless-Wea...

Then add more temperature sensors (it can handle 10) for your rooms

http://www2.oregonscientific.com/cat-Weather-sub-Weather-Sensors.html 

It has USB connectivity so I am guessing you could get the data out of it.

[chilly_charly]

RTSLVU pointed me on a very interesting solution, with the WMRS200 (119 € !) being able to home 10 temperature/humidity sensors. I'll ask the maker for a few additionnal infos.  I guess interfacing with LabVIEW will not be that easy. I have read that USB protocols can be mindblowing...

The other possibility would be to develop from scratch a solution based on µC, as suggested by Mathieu. I found a few cheap RS232-radio adaptators, and I even have some positive experience with one of them. I guess I'll need additional help since electronics is not really my field of expertise ;).

Thanks everybody. I'll keep you informed. Don't hesitate to come back with additionnal ideas. 😉

[RTSLVU]

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@chilly charly wrote:

 I guess interfacing with LabVIEW will not be that easy. I have read that USB protocols can be mindblowing...

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Yeah, I don't know... maybe they use a DLL that LabView can access?

You could try to find an older version of the base station that has an RS-232 serial port.

That would probably use general ASCII strings for communications you could eaisly sniff and figure out.