Building Wireless Sensor Networks Using Arduino电子书

Building Wireless Sensor Networks Using Arduino

Table of Contents

Building Wireless Sensor Networks Using Arduino

Credits

About the Author

About the Reviewers

www.PacktPub.com

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Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

eBooks, discount offers, and more

Questions

1. A World without Wires

XBee radio hardware

XBee product families

Versions and variants

Official XBee documentation

Your first transmission

Using the SparkFun XBee Explorer USB

Getting and running XCTU

Updating the firmware

Failed firmware updates

Configuration

Talking to the XBee module

Receiving data

Uploading the sketch

Connecting the XBee

Receiving data

Switching to API mode

First module in API mode

Sending data

Second module in API mode

Starting and joining a network

Module addressing

Network scanning and remote configuration

The Commissioning button and LEDs

Making your network secure

Distributing the network key

Trust center link key

Trust center terminology differences

Selecting encryption keys

Setting up your secure network

Disabling network joining

Other XBee families

Configuration values

Summary

2. Collecting Sensor Data

Hardware setup

Serial on XBee

Handshaking signals

Voltage levels

Serial on a computer

Serial on Arduino

XBee shields

Other shields

Software setup

Example sketches

Variable types

PROGMEM and F() strings

Pointers

Serial port setup

The xbee-arduino library

Creating the sketch

Sending and receiving data

Sending data

The ZBTxRequest objects

Creating the sketch

Blocking and polling

Running the sketch

Callbacks

Callback types

Callback limitations

Receiving data

The ZBRxResponse objects

Creating the sketch

Collecting sensor data

Reading a DHT22 sensor

Handling packets using binary.h

Building and sending a packet

Constructing a packet using binary.h

Creating the sketch

Receiving and parsing a packet

Parsing a packet using binary.h

Creating the sketch

Troubleshooting

Communication with the XBee module is not working

Modules are not joining the network

Modules cannot talk to each other

Summary

3. Storing and Visualizing Your Data

Storing your data in the cloud

Introducing Beebotte

Channels and resources

Security

Access protocols

Sending your data to Beebotte

Preparing Beebotte

Connecting your Arduino to the Internet

Writing the sketch

Visualizing your data

Accessing your data

Keeping your data locally

Sending data over the serial port

Receiving data over the serial port

Summary

4. Controlling the World

Controlling your heating and/or cooling system

Replacing the thermostat

Controlling mains power

Hairdryer – an alternative

Control systems

Adding setpoint control

Subscribing to events

Reading events

Remembering sensor readings

Thermostat controller

Controlling a relay

Controlling off-the-shelf ZigBee devices

ZigBee profiles, endpoints, and clusters

ZigBee public profiles

Selecting a ZigBee device

Talking to a ZigBee on/off device

Joining the network

Factory reset in case of problems

Discovering services

The ZBExplicitTxRequest objects

Sending a message

The ZBExplicitRxResponse objects

Receiving messages

Receiving on/off command responses

More ZigBee features

Summary

5. Standalone XBee Operation

Creating a window sensor

Connecting things

Powering the module

Connecting the window sensor

I/O pin naming

Configuring the XBee module

Remotely sampling the pins

Querying the pin state

Automatically sending the sample data

The configuration values

Receiving the samples on the coordinator

The ZBRxIoSampleResponse objects

Receiving the I/O samples

Creating a standalone relay

Connecting things

Configuring the XBee module

Remotely toggling an output pin

Summary

6. Battery Power and Sleeping

Battery power

Lithium-ion and lithium polymer batteries

Regulators

Saving power

Power saving techniques

Knowing what to optimize and when to stop

XBee power-saving

The XBee sleep modes

Configuring the network

The sleeping window sensor

Battery power

Power usage

Arduino power-saving

The XBee configuration

Hardware

Powering the Arduino

Hardware connections

Putting the Arduino to sleep

Sleep modes

Waking up

Creating the sketch

Power usage

Summary

Index