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/ESP8266.hpp	Wed Apr 20 20:13:33 2016 +0000
+++ b/ESP8266.hpp	Thu May 12 14:40:14 2016 -0500
@@ -37,9 +37,13 @@
 #include <string>
 #include <sstream>
-#include "mbed.h"
+#include "PinNames.h"
+#include "Serial.h"
+#include "DigitalOut.h"
 #include "CircularBuffer.h"
+namespace mbed { class Serial; }
 /// Interface to the ESP8266 Wi-Fi module.
 class ESP8266
@@ -116,7 +120,7 @@
   /// @param CH_PD Power-down pin on ESP8266.
   /// @param baud Baud rate that the ESP8266 is using.
   /// @param debugMsgIntf Optional serial interface for debugging messages.
-  ESP8266(const PinName tx, const PinName rx, const PinName rst, const PinName CH_PD, const int baud, Serial * debugMsgIntf = NULL);
+  ESP8266(const PinName tx, const PinName rx, const PinName rst, const PinName CH_PD, const int baud, mbed::Serial * debugMsgIntf = NULL);
   /// Reset the ESP8266 via the hardware reset pin.
@@ -183,11 +187,11 @@
   static ESP8266 * defaultInstance; ///< Default instance support for use with mbed Sockets.
-  Serial AT_intf;
-  DigitalOut resetPin;
-  mutable DigitalOut powerDownPin; ///< @note Mark as mutable for use in powered().
-  CircularBuffer<char, 1024> recvIpDataBuffer; ///< Received IP data buffer.
-  Serial * debugMsg;
+  mbed::Serial AT_intf;
+  mbed::DigitalOut resetPin;
+  mutable mbed::DigitalOut powerDownPin; ///< @note Mark as mutable for use in powered().
+  mbed::CircularBuffer<char, 1024> recvIpDataBuffer; ///< Received IP data buffer.
+  mbed::Serial * debugMsg;
   volatile bool parseRecvReset; ///< Indicates when AT interface received data parsers should be reset.
   /// Send raw AT data to the ESP8266.