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/ESP8266.cpp	Thu Jan 26 16:55:23 2017 -0600
+++ b/ESP8266.cpp	Thu Jan 26 18:00:02 2017 -0600
@@ -36,8 +36,6 @@
 #include "Timer.h"
 #include "wait_api.h"
 
-ESP8266* ESP8266::defaultInstance = NULL;
-
 static inline void disableRecvData()
 {
   __disable_irq();
@@ -48,17 +46,6 @@
   __enable_irq();
 }
 
-void ESP8266::setDefaultInstance(ESP8266 * const instance)
-{
-  if (instance != NULL)
-    defaultInstance = instance;
-}
-
-ESP8266** ESP8266::getDefaultInstance()
-{
-  return &defaultInstance;
-}
-
 ESP8266::ESP8266(const PinName tx, const PinName rx, const PinName rst, const PinName CH_PD, const int baud, mbed::Serial * debugMsgIntf)
   : AT_intf(tx, rx), resetPin(rst), powerDownPin(CH_PD), debugMsg(debugMsgIntf), parseRecvReset(false)
 {
@@ -70,15 +57,6 @@
     resetPin = 1;
   // Power down device at startup due to high current demand
   setPowered(false);
-  
-  if (defaultInstance == NULL)
-    defaultInstance = this;
-}
-
-ESP8266::~ESP8266()
-{
-  if (defaultInstance == this)
-    defaultInstance = NULL;
 }
 
 void ESP8266::reset()