I got the Jeenodes and the VG400 moisture sensor a while ago, but tonight I finally had some time to look at it.
The Arduino environment, which I have never used before, was surprisingly easy to use. I just connected the VG400 to the board wrote a couple of lines to read the input from the analog IO pin and there was a working moisture sensor. Almost too easy, and cheap, about 40 Euros (or $60) for the sensor and the jeenode together.
After I got the sensor working I verified that I got could communicate wirelessly between two nodes.
The next step is to write the code for sending/receiving data, using the existing libraries, and get a better understand for what you can do to minimize power consumption, which I guess it wise to do before using batteries to power this thing.
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