The Sigma Designs ZM5202 module is a low-cost fully integrated Z-Wave module in a small 12.5mm x 13.6mm x 1.9mm form factor. It is an ide al solution for home control applications such as access control， appliance control， AV control， building automation， energy management， lighting， security， and sensor networks in the “Internet of Things”。 It contains all the required passive components， including the crystal and a SAW filter to provide a complete Z-Wave system. The ZM5202 module remains pad and pin compatible with the ZM3102 and the ZM4102 Z-Wave modules. The ZM5202 module is based on an 8-bit 8051 CPU core， which is optimized to handle the data and link management requirements of a Z-Wave node. The patented Z-Wave protocol supports automatic retransmissions， collision avoidance mechanisms， frame acknowledgements， frame CRCs， frequency agility， and full mesh routing to ensure a highly reliable and robust wireless communication solution. An integrated baseband controller， sub-1 GHz radio transceiver， a comprehensive set of hardware peripherals， 16kB of SRAM， and 128kB of Flash memory is available for OEM applications and the Z-Wave protocol stack