Friday, January 19, 2007

It's here! New 1-wire sensors in operation

Yes! The 1-Wire sensor that I ordered arrived today. In the box from Hobby-Boards, which got here quickly thanks to fast (and cheap) shipping, included the following:

The DS9490 1-Wire USB Adapter (in blue), the Humidity/Temperature sensor and case, a RJ-45 coupler, and a special RJ-12 to RJ45 cable to interface between the sensor and USB adapter.

Here's a few photos of the inside of the Humidity/Temperature sensor.

As you may know, I am using the book Weather Toys: Building and Hacking Your Own 1-Wire Weather Station (Amazon link). In that book, author Tim Bitson takes you step-by-step in building the entire station, but he gives you the source code to the software so that you can modify and hack to your needs. Also, he set up a website for support and other ideas for the network. After setting up a mini 1-Wire network, I tried out the software, and this is what I got:

Starting SimpleWeather 1.0
Stable Library
Native lib Version = RXTX-2.1-7
Java lib Version = RXTX-2.1-7
Found Adapter: {DS9490} on Port USB1
Resetting 1-wire bus
Time = Fri Jan 19 21:09:06 CST 2007
Temperature = 72.5degs F
Humidity = 29.719664%

Time = Fri Jan 19 21:09:09 CST 2007
Temperature = 72.5degs F
Humidity = 29.721657%

Time = Fri Jan 19 21:09:12 CST 2007
Temperature = 72.5degs F
Humidity = 29.35742%

Time = Fri Jan 19 21:09:15 CST 2007
Temperature = 72.5degs F
Humidity = 29.35742%

Pretty cool, huh? I kind of changed the code to refresh every 3 seconds, instead of the default one minute. Soon, I will order some more parts to expand this network into a fully functional weather station! Watch for more details.

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