Sensors Use Building’s Electrical Wiring as Antenna

The trick reduces sensor power consumption and extends their range.

Wireless sensors scattered throughout a building can monitor everything from humidity and temperature to air quality and light levels. This seems like a good idea–until you consider the hassle and cost of replacing the sensors’ batteries every couple of years. The problem is that most wireless sensors transmit data in a way that drains battery power.

By Kate Greene

Full Story: http://www.technologyreview.com/communications/26319/?nlid=3532&a=f