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.

MAX44009.hpp

Committer:
IanBenzMaxim
Date:
19 months ago
Revision:
35:3d414ba9ab6c
Parent:
32:0a09505a656d

File content as of revision 35:3d414ba9ab6c:

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#ifndef MAX44009_HPP
#define MAX44009_HPP

#include <stdint.h>

namespace mbed { class I2C; }

/// Interface to the MAX44009 optical light sensor.
class MAX44009 {
public:
  enum Result { Success, Hardware_Failure };

  /// @param I2C_interface A configured I2C interface to use for communication.
  /// @param I2C_address Device bus address in mbed format.
  MAX44009(mbed::I2C & I2C_interface, uint8_t I2C_address);

  /// Read the current lux from the MAX44009.
  /// @returns Success or Hardware_Failure.
  Result read_current_lux(double & lux) const;

private:
  /// MAX44009 Register addresses.
  enum Register { Lux_High_Byte_Reg = 0x03, Lux_Low_Byte_Reg = 0x04 };

  mbed::I2C & m_I2C_interface;
  uint8_t m_I2C_address;
};

#endif