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/WebServerInterface.hpp	Thu Jan 26 14:18:21 2017 -0600
+++ b/WebServerInterface.hpp	Thu Jan 26 16:55:23 2017 -0600
@@ -46,7 +46,7 @@
 
 namespace mbed { class Serial; }
 namespace OneWire { class ISha256MacCoproc; }
-class NetworkStack;
+class ESP8266;
 struct SensorData;
 
 /// Network interface to the web server supporting authenticated posting of event
@@ -56,7 +56,11 @@
 public:  
   /// @param esp8266 Interface to ESP8266 for Wi-Fi access.
   /// @param pc Optional serial interface for received web traffic.
-  WebServerInterface(NetworkStack & networkStack) : networkStack(networkStack) { }
+  WebServerInterface(ESP8266 & esp8266) : esp8266(esp8266) { }
+  
+  /// Initialize network interface and connect to access point.
+  /// @returns True on success.
+  bool initialize();
   
   /// Send an authenticated event message to the web server.
   /// @param macCoProc Coprocessor such as the DS2465 used to calculate the authentication MAC.
@@ -81,6 +85,8 @@
 private:
   /// @{
   /// Configuration strings.
+  static const char wifiSsid[];
+  static const char wifiPassword[];
   static const char serverAddress[];
   static const unsigned int serverPort;
   static const char serverPostPath[];
@@ -90,9 +96,7 @@
   OneWire::RomId m_sessionId;
   std::string m_sessionIdString;
   
-  NetworkStack & networkStack;
-  
-  char recvBuf[1024];
+  ESP8266 & esp8266;
 };
 
 #endif
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