The DM2200 module from RF Monolithics Inc.
, Dallas, TX, is an embedded module that communicates 600 m in open air, consumes 4.5 mA in receive mode and 68 µA in standby mode, and uses the company's VersaMESH mesh networking protocol. VersaMESH uses a rules-based routing architecture and lets every node in the network function as a router while also connecting to sensors. Any node can communicate to any other node without having to route through a single network master or coordinator. Each module operates in the 900 MHz band, has a serial port and 10 configurable I/O ports, and its application environment supports user applications running on its embedded microcontroller.