book

Building iPhone and iPad Electronic Projects

by Mike Westerfield

September 2013

Intermediate to advanced

332 pages

8h 30m

English

O'Reilly Media, Inc.

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Conventions Used in This BookUsing Code ExamplesSafari® Books OnlineHow to Contact UsAcknowledgmentsCredits
Your Own TricorderA Crash Course in techBASICtechBASIC SamplerRunning Your First ProgramCreating a ProgramThe Accelerometer
The GyroscopeRadians or Degrees?The MagnetometerFaster Sensor ResponseHeadingLocationYour Own Tricorder
The iPhone/iPad MagnetometerThe Earth’s Magnetic FieldUsing the iPhone or iPad as a Metal DetectorConverting the Magnetometer Sample into a Metal DetectorUsing the Metal DetectorFinding Out More
What Is HiJack?Building the SensorExternal Power for HiJackHello HiJackWhen Things Go WrongA Better HiJack ProgramFor More Information
Adding a Moisture Meter to the TricorderAssembling the Moisture MeterCalibrationCollecting the Calibration DataMoving Datafiles to and from techBASICUsing the Calibration DataBetter SoftwareThe Complete Moisture Meter Source
What Is Bluetooth Low Energy?The TI SensorTagWriting Bluetooth Low Energy ProgramsThe AccelerometerWhat’s an Accelerometer?Accessing the AccelerometerUsing the AccelerometerThe SourceThe BarometerAccessing the BarometerThe SourceThe GyroscopeAccessing the GyroscopeUsing the GyroscopeThe SourceThe MagnetometerAccessing the MagnetometerUsing the MagnetometerThe SourceThe Humidity Sensor (Hygrometer)Accessing the HygrometerThe SourceThe ThermometerAccessing the ThermometerUsing the ThermometerThe SourceFurther Explorations
A Bit of Rocket ScienceParts ListsST-1ST-2Other Items for Both RocketsWhy Use a SensorTag?ConstructionST-2: The iPhone/SensorTag RocketST-1: The SensorTag RocketThe Data Collection ProgramSensorTag 8G SoftwareFlight TipsEnginesParachutesFlight ConditionsPower Up!The DataAnalyzing the DataRocket Data AnalysisVelocity and AltitudeRotation and PressureWhat We FoundST-1 ResultsST-2 Results
Controlling a Truck with BLESelecting a TruckDisassemblyHacking the TruckThe H BridgeThe TI ChipWiring the Complete CircuitControlling the Arduino UnoInstalling ArduinoDownloading FirmataInstalling FirmataThe SoftwarePulse Width ModulationState enginesBack to the SoftwareStart Your Engines!
Bluetooth Low Energy Slave ModeBLE ChatSetting Up the ServicesUsing the Services

The Classic Game of PongThe Paddles GameThe Paddle SoftwareThe Paddles Console Software
Worldwide SensorsHTTP, FTP, and TCP/IPWiFlyThe CircuitEstablishing a Network ConnectionCommunication with TCP/IPA Simple Terminal ProgramWiFi ArduinoLoading Software onto the ArduinoThe CircuitCommunication Using the Terminal Program
Servos: They’re Where the Action IsThe Pololu Serial Servo ControllerThe CircuitHalloween HijinksThe SoftwareTake It for a SpinPush and Pull with ServosPomp and Circumstance

Content preview from Building iPhone and iPad Electronic Projects

Chapter 1. Getting Familiar with techBASIC and Built-in Sensors

Prerequisites: You should already be familiar with using your iPhone. You should have some idea what programming is all about, although you do not need to be an ace programmer. It helps to know some variant of BASIC, but this is not required.
Equipment: You will need an iPhone, iPod Touch, or iPad running iOS 5 or later.
Software: You will need a copy of techBASIC or techBASIC Sampler.
What You Will Learn: This chapter starts with an introduction to techBASIC, the technical programming language used in this book for accessing sensors. It shows how to access the accelerometer that is built into every iOS device, starting with a simple one-line program and working up to a sophisticated accelerometer app.

Your Own Tricorder

I was always a little jealous when Spock pulled out his tricorder on Star Trek and began measuring practically every physical value you could imagine. It’s staggering how far technology has come, though. I carry a tricorder around in my pocket all the time now! Mine measures acceleration, rotation, and magnetic fields, giving both the strength and direction of each. It’s not quite as sophisticated as Spock’s, but it’s also not so large and clunky.

This book is all about using your iPhone and iPad to control electronic devices, often sensors. We’re going to start off with the sensors that are built right in, so you can pop out your tricorder and measure stuff, too.