My initial idea was to get a number of Arduino boards with Bluetooth LE (a radio technology which I really would like to play with). However, all the Arduino boards were really expensive and I could not find a single one with Bluetooth LE, so it was no alternative.
After surveying the market for nodes for my sensor network I settled for jeenodes:
The Jeenode is similar to Arduino, the same tool chain can be used when developing for it, but it is much cheaper, about $20 per node, which includes an Amtel 328, ports for connecting it to sensors and a radio module for multi channel FSK for the ISM-band. It is going to be fun to play with when I get it.
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