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.

Revision:
28:e5cdaf13d299
Parent:
27:81a87d29bedd
Child:
29:590a7561318b
--- a/ESP8266.hpp	Fri Dec 16 20:14:05 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,220 +0,0 @@
-/*******************************************************************************
-* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
-*
-* Permission is hereby granted, free of charge, to any person obtaining a
-* copy of this software and associated documentation files (the "Software"),
-* to deal in the Software without restriction, including without limitation
-* the rights to use, copy, modify, merge, publish, distribute, sublicense,
-* and/or sell copies of the Software, and to permit persons to whom the
-* Software is furnished to do so, subject to the following conditions:
-*
-* The above copyright notice and this permission notice shall be included
-* in all copies or substantial portions of the Software.
-*
-* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
-* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-* OTHER DEALINGS IN THE SOFTWARE.
-*
-* Except as contained in this notice, the name of Maxim Integrated
-* Products, Inc. shall not be used except as stated in the Maxim Integrated
-* Products, Inc. Branding Policy.
-*
-* The mere transfer of this software does not imply any licenses
-* of trade secrets, proprietary technology, copyrights, patents,
-* trademarks, maskwork rights, or any other form of intellectual
-* property whatsoever. Maxim Integrated Products, Inc. retains all
-* ownership rights.
-*******************************************************************************
-*/
-
-#ifndef ESP8266_HPP
-#define ESP8266_HPP
-
-#include <string>
-#include <sstream>
-
-#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
-{
-public:
-  /// Result of sending an AT command.
-  enum CmdResult
-  {
-    AT_OK = 1,
-    AT_FAIL = 0,
-    AT_ERROR = -1,
-    HardwareError = -2,
-    TimeoutError = -3
-  };
-  
-  /// ESP8266 Wi-Fi mode.
-  enum WifiMode
-  {
-    station_mode = 1,
-    softAP_mode = 2,
-    softAP_station_mode = 3
-  };
-  
-  /// Connection type.
-  enum ConnType
-  {
-    TCP,
-    UDP
-  };
-  
-  /// Recovery time between Send Data operation as specified by datasheet.
-  static const unsigned int sendDataRecoveryTimeMs = 1000;
-  
-  /// Builds command strings for the ESP8266 with proper formatting.
-  class CmdBuilder
-  {
-  public:
-    /// @param cmd Command of the format "AT+[cmd]".
-    CmdBuilder(const std::string & cmd = "");
-    
-    /// Clear all arguments.
-    /// @param cmd Command of the format "AT+[cmd]".
-    void clear(const std::string & cmd);
-    
-    /// Append an argument using the default string conversion for that type.
-    /// @param arg Argument to append to the command.
-    template <typename T> void addRawArgument(const T & arg)
-    {
-      cmdStream << ((numArgs == 0) ? "=" : ",") << arg;
-      numArgs++;
-    }
-    
-    /// Append a string argument with proper quoting.
-    /// @param arg Argument to append to the command.
-    void addStringArgument(const std::string & arg);
-    
-    /// Create a string suitable for use with sendCommand().
-    /// @returns The formatted command string.
-    std::string str() const;
-    
-  private:
-    int numArgs;
-    std::ostringstream cmdStream;
-  };
-  
-  /// @{
-  /// Default instance support for use with mbed Sockets.
-  static void setDefaultInstance(ESP8266 * const instance);
-  static ESP8266** getDefaultInstance();
-  /// @}
-  
-  /// @param tx Transmit pin from mbed to ESP8266.
-  /// @param rx Receive pin from ESP8266 to mbed.
-  /// @param rst Reset pin on ESP8266.
-  /// @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, mbed::Serial * debugMsgIntf = NULL);
-  ~ESP8266();
-  
-  /// Reset the ESP8266 via the hardware reset pin.
-  void reset();
-  
-  // Update the baud rate for the ESP8266.
-  void setBaud(int baud) { AT_intf.baud(baud); }
-  
-  /// @{
-  /// Control if the ESP8266 is powered via the hardware power-down pin.
-  bool powered() const;
-  void setPowered(bool powered);
-  /// @}
-  
-  /// Perform a self-test on the ESP8266.
-  CmdResult performSelfTest();
-  
-  /// Set the current Wi-Fi mode.
-  CmdResult setCurrentWifiMode(const WifiMode mode);
-  
-  /// Join a Wi-Fi access point.
-  /// @param ssid Network SSID to connect to.
-  /// @param pwd Network password.
-  /// @param bssid Optional network BSSID.
-  CmdResult joinCurrentAccessPoint(const std::string & ssid, const std::string & pwd, const std::string & bssid = "");
-  
-  /// Quit the current access point.
-  CmdResult quitAccessPoint();
-  
-  /// Set the maximum WiFi tranmission power.
-  /// @param power_dBm Power in dBm valid from 0 to 20.5 in 0.25 dBm increments.
-  CmdResult setMaxRFTXPower(const float power_dBm);
-  
-  /// Ping a host via the current access point.
-  /// @param IP IP address or resolvable hostname.
-  CmdResult ping(const std::string & IP);
-  
-  /// Open a connection to a host via the current access point.
-  /// @param type TCP or UPD connection.
-  /// @param remoteIP IP address or resolvable hostname to connect to.
-  /// @param remotePort Port on the host to connect to.
-  CmdResult openConnection(const ConnType type, const std::string & remoteIP, const unsigned int remotePort);
-  
-  /// Close the connection to the current host.
-  CmdResult closeConnection();
-  
-  /// Send data to the currently connected host.
-  /// @param data May be in text or binary form.
-  CmdResult sendData(const std::string & data);
-  
-  /// Send an AT command to the ESP8266.
-  /// @param cmd Formatted command to send.
-  CmdResult sendCommand(const CmdBuilder & cmd);
-  
-  /// Check if received IP data is available in the buffer.
-  /// @note Allow some processing delay to happen between calls to this function.
-  /// @returns True if data is available.
-  bool recvIpDataReadable();
-  /// Get the next character of received IP data from the buffer.
-  char getcRecvIpData();
-  /// Clear all received data from the buffer.
-  void clearRecvData();
-  
-private:
-  static ESP8266 * defaultInstance; ///< Default instance support for use with mbed Sockets.
-  
-  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.
-  /// @param cmdString Data to send.
-  /// @param expectEcho True if the ESP8266 will echo sent data back.
-  CmdResult send_AT_data(const std::string & cmdString, const bool expectEcho);
-  
-  /// Attempts to read an entire line terminated with \r\n from the AT interface.
-  /// \r will be preserved in the final string and \n will be stripped.
-  /// @param line Buffer to store received characters in.
-  /// @returns True if an entire line was read.
-  bool read_line(std::string & line);
-  
-  /// Callback for when data is received on the AT interface.
-  void recv_AT_data_cb();
-  /// Parse the next character received on the AT interface checking for valid IP data.
-  void parseRecvIpData(const char received);
-  /// Parse the next character receive on the AT interface for the connection closed message.
-  void parseRecvConnClosedMsg(const char received);
-  
-  /// Print a message on the debugging interface if setup.
-  /// @param message Null terminated string.
-  void printDbgMsg(const char * message);
-};
-
-#endif
\ No newline at end of file