A wireless sensor system for providing irrigation control includes a multiple number of sensor nodes and a multiple number of actuator nodes. Each sensor node includes a wireless transceiver, a processor and a sensor device and provides sensor data. Each actuator node includes a wireless transceiver,...http://www.google.ca/patents/US20080129495?utm_source=gb-gplus-sharePatent US20080129495 - Wireless sensor system for environmental monitoring and control
