Designing embedded systems and the internet of things (IoT) with the ARM Mbed

About the Author xiii Preface xv Author's Acknowledgments xix About the companion website xxi Part I Introduction to Arm (R) Mbed (TM) and IoT 1 1 Introduction to Arm (R) Mbed (TM) 3 1.1 What is an Embedded System? 3 1.2 Microcontrollers and Microprocessors 4 1.3 ARM (R) Processor Architecture 8 1.4 The Arm (R) Mbed (TM) Systems 10 1.4.1 NXP LPC1768 11 1.4.2 NXP LPC11U24 14 1.4.3 BBC Micro:bit 15 1.4.4 The Arm (R) Mbed (TM) Ethernet Internet of Things (IoT) Starter Kit 17 1.5 Summary 21 1.6 Chapter Review Questions 21 2 Introduction to the Internet of Things (IoT) 23 2.1 What is the Internet of Things (IoT)? 23 2.2 How Does IoT Work? 24 2.3 How Will IoT Change Our Lives? 25 2.4 Potential IoT Applications 27 2.4.1 Home 27 2.4.2 Healthcare 28 2.4.3 Transport 28 2.4.4 Energy 28 2.4.5 Manufacture 28 2.4.6 Environment 28 2.5 Summary 29 2.6 Chapter Review Questions 29 3 IoT Enabling Technologies 31 3.1 Sensors and Actuators 31 3.2 Communications 31 3.2.1 RFID and NFC (Near?]Field Communication) 32 3.2.2 Bluetooth Low Energy (BLE) 32 3.2.3 LiFi 33 3.2.4 6LowPAN 33 3.2.5 ZigBee 34 3.2.6 Z?]Wave 34 3.2.7 LoRa 34 3.3 Protocols 35 3.3.1 HTTP 35 3.3.2 WebSocket 36 3.3.3 MQTT 37 3.3.4 CoAP 38 3.3.5 XMPP 38 3.4 Node?]RED 39 3.5 Platforms 41 3.5.1 IBM Watson IoT-Bluemix (http://www.ibm.com/internet?]of?]things/) 41 3.5.2 Eclipse IoT (https://iot.eclipse.org/) 42 3.5.3 AWS IoT (https://aws.amazon.com/iot/) 42 3.5.4 Microsoft Azure IoT Suite (https://azure.microsoft.com/en?]us/suites/iot?]suite/) 42 3.5.5 Google Cloud IoT (https://cloud.google.com/solutions/iot/) 44 3.5.6 ThingWorx (https://www.thingworx.com/) 44 3.5.7 GE Predix (https://www.predix.com/) 44 3.5.8 Xively (https://www.xively.com/) 44 3.5.9 macchina.io (https://macchina.io/) 45 3.5.10 Carriots (https://www.carriots.com/) 45 3.6 Summary 45 3.7 Chapter Review Questions 45 Part II Arm (R) Mbed (TM) Development 47 4 Getting Started with Arm (R) Mbed (TM) 49 4.1 Introduction 49 4.2 Hardware and Software Required 49 4.2.1 Hardware 49 4.2.2 Software 50 4.3 Your First Program: Blinky LED 53 4.3.1 Connect the Mbed to a PC 53 4.3.2 Click "mbed.htm" to Log In 53 4.3.3 Add the FRDM?]K64F Platform to Your Compiler 54 4.3.4 Import an Existing Program 54 4.3.5 Compile, Download, and Run Your Program 57 4.3.6 What Next? 57 4.4 Create Your Own Program 57 4.5 C/C++ Programming Language 58 4.6 Functions and Modular Programming 58 4.7 Manage Platforms 61 4.8 Clone Your Program 63 4.9 Search and Replace 64 4.10 Compile Your Program for Multiple Platforms 65 4.11 Delete Your Program 65 4.12 Disaster Recovery Procedure 67 4.13 Upgrade Firmware 67 4.14 Help 67 4.15 Summary 69 5 Inputs and Outputs 71 5.1 Digital Inputs and Outputs 71 5.1.1 Digital Inputs 71 5.1.2 Digital Outputs 74 5.1.3 BusIn, BusOut, and BusInOut 79 5.2 Analog Inputs and Outputs 81 5.2.1 Analog Inputs 81 5.2.2 Analog Outputs 82 5.3 Pulse Width Modulation (PWM) 86 5.4 Accelerometer and Magnetometer 88 5.5 SD Card 96 5.6 Local File System (LPC1768) 99 5.7 Interrupts 100 5.8 Summary 101 6 Digital Interfaces 103 6.1 Serial 103 6.2 SPI 106 6.3 I2C 108 6.4 CAN 111 6.5 Summary 113 7 Networking and Communications 115 7.1 Ethernet 115 7.2 Ethernet Web Client and Web Server 119 7.3 TCP Socket and UDP Socket 124 7.4 WebSocket 128 7.5 WiFi 131 7.6 Summary 135 8 Digital Signal Processing and Control 137 8.1 Low?]Pass Filter 137 8.2 High?]Pass Filter 141 8.3 Band?]Pass Filter 143 8.4 Band?]Stop Filter and Notch Filter 146 8.5 Fast Fourier Transform (FFT) 149 8.6 PID Controller 160 8.7 Summary 164 9 Debugging, Timer, Multithreading, and Real?]Time Programming 165 9.1 Debugging 165 9.2 Timer, Timeout, Ticker, and Time 167 9.3 Network Time Protocol (NTP) 171 9.4 Multithreading and Real?]Time Programming 173 9.5 Summary 179 10 Libraries and Programs 181 10.1 Import Libraries and Programs 181 10.2 Export Your Program 181 10.3 Write Your Own Library 182 10.4 Publish Your Library 188 10.5 Publish Your Program 190 10.6 Version Control 192 10.7 Collaborations 196 10.8 Update Your Library and Program 201 10.9 Summary 202 Part III The IoT Starter Kit and IoT Projects 203 11 Arm (R) Mbed (TM) Ethernet IoT Starter Kit 205 11.1 128x32 LCD 205 11.2 Joystick 207 11.3 Two Potentiometers 208 11.4 Speaker 209 11.5 Three?]Axis Accelerometer 211 11.6 LM75B Temperature Sensor 211 11.7 RGB LED 212 11.8 Summary 214 12 IoT Projects with Arm (R) Mbed (TM) 215 12.1 Temperature Monitoring over the Internet 215 12.2 Smart Lighting 224 12.3 Voice?]Controlled Door Access 230 12.4 RFID Reader 237 12.5 Cloud Example with IBM Watson Bluemix 242 12.5.1 IBM Quickstart Service 243 12.5.2 IBM Registered Service (Bluemix) 245 12.5.3 Add IBM Watson IoT Service to Your Application 252 12.5.4 Add Your Mbed Device to Your Watson IoT Organization 252 12.5.5 Adding Credentials onto Your Mbed Device 257 12.5.6 Link Your IBM IoT Watson Application to Your Mbed Device 257 12.5.7 Sending Commands from Your IBM IoT Watson Application to Your Mbed Board 261 12.5.8 More with Node-RED 261 12.6 Real-Time Signal Processing 271 12.7 Summary 277 Part IV Appendices 279 Appendix A: Example Codes 281 Appendix B: HiveMQ MQTT Broker 285 Appendix C: Node?]RED on Raspberry Pi 295 Appendix D: String and Array Operations 303 Appendix E: Useful Online Resources 311 Index 313