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 6. Bluetooth Low Energy

Prerequisites

Read Chapter 1 and the end of Chapter 2 (the section on the techBASIC help system) if you need some help with techBASIC.

Equipment

You will need an iPhone 4S or later, iPod 5th Gen or later, or iPad 3 or later running iOS 5 or later. The chapter uses the Texas Instruments SensorTag as a sample device. You could follow along with any Bluetooth low energy device, but obviously it will be simpler to use the SensorTag. See Table 6-1 for a complete parts list.

Software

You will need a copy of techBASIC or techBASIC Sampler.

This chapter introduces Bluetooth low energy, a rapidly expanding technology for sensors. It’s used in the next two chapters for accessing sensor data from a model rocket and for controlling an RC truck using an Arduino microcontroller, just two of the many ways Bluetooth low energy technology can be used from an iOS device.

Chapters 9 and 10 show how to convert an iOS device so it becomes a Bluetooth low energy device that can be sensed and read by other devices, including other iOS devices.

What Is Bluetooth Low Energy?

Bluetooth low energy, also known as Bluetooth 4.0, BLE, Bluetooth LE, and Bluetooth Smart, is a new twist on the old Bluetooth standard. It’s designed for ultra-low-energy sensors that can run off of coin cell batteries. Some of the Bluetooth low energy devices that are already available include sports fitness sensors like bicycle speedometers and pedometers built into Nike running shoes; health ...