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More About This Title Professional Android Open Accessory Programming with Arduino
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Learn how to control your home or car from your Android smartphone - air conditioning, lights, entertainment systems, and more!
Android Open Accessory is a new, simple, and secure protocol for connecting any microcontroller-empowered device to an Android smartphone or tablet. This Wrox guide shows Android programmers how to use AOA with Arduino, the microcontroller platform, to control such systems as lighting, air conditioning, and entertainment systems from Android devices. Furthermore, it teaches the circuit-building skills needed to create games and practical products that also take advantage of Android technology.
Introduces Android Open Accessory and shows how to set up the hardware and development environmentExplains how to code both Android and Arduino elements of an accessoryFeatures four complete projects developers can build using various sensors and indicators/actuators, including source codeGives Android developers the tools to create powerful, sophisticated projectsProfessional Android Open Accessory with Android ADK and Arduino opens exciting new opportunities for Android developers.
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Andreas Goransson has created a set of libraries and tools for Arduino ADK boards to communicate easily over USB with Android devices, in collaboration with David Cuartielles Ruiz. He is an active contributor to popular programming communities, where he creates both tools and libraries.
David Cuartielles Ruiz is co-founder of the Arduino prototyping platform and head of the Prototyping Laboratory at K3, Malmo University, Sweden. Together with Andreas Goransson, he has written libraries that enable Arduino to communicate with Android phones over Bluetooth.
Wrox Professional guides are planned and written by working programmers to meet the real-world needs of programmers, developers, and IT professionals. Focused and relevant, they address the issues technology professionals face every day. They provide examples, practical solutions, and expert education in new technologies, all designed to help programmers do a better job.
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INTRODUCTION xxi
PART I: WELCOME TO THE WONDERFUL WORLD OF ACCESSORIES
CHAPTER 1: INTRODUCTION TO ANDROID OPEN ACCESSORY 3
I, Android 3
The Three Laws of Android 4
The Android Philosophy 6
Other Popular Systems 7
Preinstalled Applications 8
What Is Android Open Accessory? 9
Android USB in Short 9
Developing Android Accessories 10
What Is Arduino? 10
How Does AOA Work with Arduino? 11
What Can You Do with AOA? 12
What Can’t You Do with AOA? 13
Why it Matters that Google Chose Arduino 14
Summary 15
CHAPTER 2: SETTING UP THE (ARDUINO) HARDWARE 17
Choosing Microcontroller Boards for Your Project 18
One Platform, Many Architectures 18
Shields 26
Choosing Sensors and Actuators for Your Project 29
Sensors 30
Actuators 34
Powering up Your Project 38
Ways to Power up Your Project 38
Arduino Feeding Your Phone 41
Summary 41
CHAPTER 3: UNDERSTANDING DATA COMMUNICATION 43
Data Communication Basics 43
Protocols 44
Terminology 45
Hardware Layer for the Communication Protocol 47
ADB 47
Accessory Mode 48
Host Mode 48
TCP/IP 50
Audio Port 52
Bluetooth Options 53
Introducing MQTT 54
Heads Up! 55
MQTT Messages 58
P2PMQTT: A Modifi ed MQTT 63
Establishing a Connection 63
Subscribing to a Topic 63
Publishing a Message 64
Disconnecting 64
Summary 64
CHAPTER 4: SETTING UP DEVELOPMENT ENVIRONMENTS 67
Setting up Android Development 67
Android Development Environment 69
Hello, Android! 79
Setting up Arduino Development 80
Arduino Development Environment 80
Hello, Arduino! 82
Hello Open Accessory App 85
The Temperature Sensor 85
The Arduino Sketch 87
The Android Project 88
Ready to Go 88
Summary 89
CHAPTER 5: CREATING THE ACCESSORY LIBRARY 91
Getting Started with Android Libraries 92
Building the P2PMQTT Library 92
Preparing the Library Project 92
Sketching the API 93
Implementing MQTT 94
Decoding MQTT 108
Managing Open Accessory Connections 117
Creating the Connection Class 117
USB Connection 119
Bluetooth Connection 123
Creating the Connection 126
Summary 131
CHAPTER 6: USING YOUR ACCESSORY LIBRARY 133
Using Custom Android Libraries 133
The WroxAccessories Library 134
Building the Mini Projects 137
The LSMSD 137
The Parking Assistant 145
The Basic Robot 154
The Sampler 164
Summary 170
CHAPTER 7: DIGITAL ARDUINO 171
Digital Actuators 172
The Blinking LEDs 172
Controlling a Desk Lamp — The Relay 178
Digital Project 1: Large SMS Display 182
Writing the Arduino Program 186
Digital Sensors 190
Buttons and Switches 190
Tilt Sensor 194
Digital Project 2: Small Sampler 197
Summary 202
CHAPTER 8: ANALOG ARDUINO 205
Analog Actuators 206
The Piezo Element 207
Motors 211
Analog Project 1: The Basic Robot 215
Analog Sensors 223
Potentiometers 224
Ultrasound Sensors 228
Analog Project 2: The Parking Assistant 233
Summary 239
PART II: PROJECTS
CHAPTER 9: BIKE RIDE RECORDER 243
The Concept Behind Bike Computers 244
The Design Brief 245
Working with the Arduino Side 246
Creating the Hardware and Mechanics 247
Programming the Bike Computer 251
Building the Android App 259
Creating the Bike Ride Recorder Project 260
Creating the User Interface 261
Setting up the AoaService 266
Building the Main Menu Activity 271
Building the Recording Activity 271
Building the List Recordings View 282
Building the Playback View Activity 285
Making Further Improvements 290
Mechanics 290
More Sensors 290
Making a Better App 290
Summary 291
CHAPTER 10: KITCHEN LAMP 293
The Concept 293
The Design Brief 295
The Arduino Side 296
Hardware 298
Software 301
Building The Android App 307
Sketching the Application Layout 307
Create the Kitchen Lamp Project 308
Create the User Interface 308
Building the Kitchen Timer 313
Responding to Phone Calls 315
Listen for SMS Events 319
Connecting to the WroxAccessory 322
Further Improvements 325
Product-ready Embedded System 326
Making a Better App 326
Summary 327
CHAPTER 11: MR. WILEY 329
The Concept 330
The Design Brief 331
The Arduino Side 332
The Hardware 332
The Firmware (on the Robot Board) 335
Creating Software for the Mega ADK Board 340
Building the Android App 342
Sketching the Application Layout 343
Creating the Mr. Wiley Project 343
Building the Computer Vision Algorithm 348
Connecting to the WroxAccessory 358
Making Further Improvements 364
Electronics 364
Making a Better App 364
Summary 364
INDEX 365
