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/DS7505.hpp	Thu May 26 21:14:22 2016 +0000
+++ b/DS7505.hpp	Fri May 27 11:47:20 2016 -0500
@@ -62,13 +62,13 @@
   
   /// Reads the current temperature with an exponent of 10^-2.
   /// @note Compatible with Bluetooth characteristic: org.bluetooth.characteristic.temperature.
-  Result read_current_temp(std::int16_t & temperature) const;
+  Result read_current_temp(int16_t & temperature) const;
   
   /// Reads the current temperature as a floating point value.
   Result read_current_temp(double & temperature) const;
   
   /// Reads the current temperature as an integer value.
-  Result read_current_temp(std::int8_t & temperature) const;
+  Result read_current_temp(int8_t & temperature) const;
   
 private:
   /// Bit resolution of temperature conversions.

--- a/common.hpp	Thu May 26 21:14:22 2016 +0000
+++ b/common.hpp	Fri May 27 11:47:20 2016 -0500
@@ -41,10 +41,10 @@
 /// Contains a set of sensor measurements.
 struct SensorData
 {
-  static const std::int8_t tempAlarmLevel = 26;
+  static const int8_t tempAlarmLevel = 26;
   static const uint8_t filterLifeAlarmLevel = 20;
   
-  std::int8_t temp;
+  int8_t temp;
   uint8_t filterLife;
   
   bool tempAlarm() const { return (temp >= tempAlarmLevel); }