Claimed to be the industry's first ZigBee Smart Energy-compliant module to combine lower power, faster deployment and compliance with wireless standards, the ZMM-01 is from ByteSnap Design. It also provides a real-time clock, accurate up to 2ppm. By implementing the ZigBee Smart Energy protocol, the module is able to use the command-set specified by the standard to control energy equipment within the home or office. Wirelessly connecting to other devices through the ZigBee mesh network, the module helps to lower power usage in smart homes and offices by implementing building management protocols. It can be used in many types of distributed control and monitoring systems, claims the company, for example, wireless charging for electric vehicles, street lighting control, data centre power monitoring and building air-conditioning control. The module is based on the Ember EM357 radio-on-a-chip, which integrates an IEEE 802.15.4-compliant, ZigBee wireless transceiver with the ARM Cortex-M3 microcontroller. It is able to run the ZigBee Smart Energy protocol and application code while still consuming just 30mA to transmit. The Cirrus Logic CS5467 analogue front end measures voltage and current to calculate active, reactive and apparent power with energy linearity ±0.1% of reading over 1000:1 dynamic range.
