So why not take a module like this2.4GHz Transceiver Low Power nRF24L01+http://arduino-direct.com/sunshop/index.php?l=product_detail&p=188and mate it to uC board with minimal components and connections to a battery?
Luidr,Do some reading for more info.http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowToI have not tried them myself.
So I have been wondering about wireless sensor networks and home automation for a while. I wanted to know how low I could really push down the price of bi-directional sensor network.
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