A wireless sensor network for residential electrical energy consumption measurement

A wireless sensor network for residential electrical energy consumption measurements is presented. The system integrates wireless sensors to measure the energy consumption of individual electrical circuits in a breaker panel. Each sensor is battery-powered and transmits its data using the 802.15.4 wireless protocol to a communication hub which forwards the aggregated data to a server via Ethernet or Wi-Fi. The sensors use Hall-effect current sensors, a microcontroller, two button-cell batteries and a wireless transmitter. The sensors accuracy is better than 0.8 A on a range of 0–30 A.