Maxim's MAXREFDES143# is IoT embedded security reference design, built to protect an industrial sensing node by means of authentication and notification to a web server. In this IoT-embedded world, security emerges as a paramount feature to protect industrial equipment from counterfeiting while tracking product lifetime with smart notifications. The MAXREFDES143# is a reference design that demonstrates an authenticated data chain from a protected sensor node to a web server. The hardware on the MAXREFDES143# includes a peripheral module representing a protected sensor node monitoring operating temperature and remaining life of a filter (simulated through ambient light sensing) and an mbed shield representing a controller node responsible for monitoring one or more sensor nodes. The design is hierarchical with each controller node communicating data from connected sensor nodes to a web server that maintains a centralized log and dispatches notifications as necessary. The mbed shield contains a Wi-Fi module, a DS2465 coprocessor with 1-Wire® master function, an LCD, LEDs, and pushbuttons. The protected sensor node contains a DS28E15 authenticator, a DS7505 temperature sensor, and a MAX44009 light sensor. The mbed shield communicates to a web server by the onboard Wi-Fi module and to the protected sensor node with I²C and 1-Wire. The MAXREFDES143# is equipped with a standard shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The simplicity of this design enables rapid integration into any star-topology IoT network requiring the heightened security with low overhead provided by the SHA-256 symmetric-key algorithm.

Note: Programming the MAXREFDES143# requires a separate purchase of a MAX32600MBED# development platform or equivalent Arduino form factor platform.