Maxim Integrated / Mbed 2 deprecated DeepCover Embedded Security in IoT

MAXREFDES143#: DeepCover Embedded Security in IoT Authenticated Sensing & Notification

Dependencies:   MaximInterface mbed

The MAXREFDES143# is an Internet of Things (IoT) embedded security reference design, built to protect an industrial sensing node by means of authentication and notification to a web server. The hardware 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.

More information about the MAXREFDES143# is available on the Maxim Integrated website.

--- a/main.cpp	Mon Jun 06 10:49:15 2016 -0500
+++ b/main.cpp	Wed Jun 15 13:28:59 2016 -0500
@@ -335,8 +335,10 @@
             // Wait and try again
             wait_ms(webPostRetryIntervalMs);
           }
+          // Too many retry attempts
           else
           {
+            // Assume we have lost network connection
             nextStatus = ControllerHardwareError;
             break;
           }
@@ -441,7 +443,7 @@
     break;
     
   case ControllerHardwareError:
-    lcd.writeMessage("Controller Hardware Error");
+    lcd.writeMessage("Controller Hardware Error: Check Wi-Fi");
     lcd.setBackLightColor(Red);
     break;