Book Image

Wearable-Tech Projects with the Raspberry Pi Zero

By : Jon Witts
Book Image

Wearable-Tech Projects with the Raspberry Pi Zero

By: Jon Witts

Overview of this book

With Wearable-Tech Projects with the Raspberry Pi Zero, you will begin with learning how to install the required software for your upcoming projects. You will also learn how to control electronic devices with the GPIOZero Python library. Next, you will be creating some stylish wearable-tech projects such as a motion-reactive LED cap and a Tweet-activated LED T-shirt. Toward the end of the book, you will be creating some useful health and fitness wearable-tech projects; these will help you monitor your heart rate, track your movements with GPS, and count your footsteps with your own pedometer. By the end of the book, you will have created a range of wearable-tech projects and learned enough about your Raspberry Pi Zero that you should be able to adapt these projects further or come up with your own creations!

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Table of Contents (10 chapters)
Preface
Preface
What this book covers
What you will need
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
About the Raspberry Pi
About the Raspberry Pi
What we will cover
A little history
The bill of parts
Installing our software
Connecting to GPIO headers
Headless access
Basic electronics
Summary
2
Scrolling LED Badge
Scrolling LED Badge
What we will cover
The bill of parts
Putting the hardware together
Installing and writing the software
Finalizing our hardware setup
Putting it all together
Summary
3
Sewable LEDs in Clothing
Sewable LEDs in Clothing
What We Will Cover
The bill of parts
Modifying our item of clothing
Writing our Python program
Making our program start automatically
Summary
4
A Motion-Reactive LED Cap
A Motion-Reactive LED Cap
What we will cover
The bill of parts
Connecting our hardware
Modifying our cap
Writing our program
Making our program start automatically
Summary
5
A Tweet-Activated LED T-Shirt
A Tweet-Activated LED T-Shirt
What we will cover
The bill of parts
Creating our personal t-shirt design
Adding our LEDs to our fabric
Testing our LEDs
Writing our main Python program
Connecting our Pi Zero to the internet
Making our program start automatically
Finalizing the garment modifications
Summary
6
An LED Laptop Bag
An LED Laptop Bag
What we will cover
The bill of parts
Creating our electrical circuit
Controlling our LED strip with Python
Adding our LED strip to the bag
Writing our main Python program
Making our program start automatically
Summary
7
Creating Your Own Pedometer
Creating Your Own Pedometer
What we will cover
The bill of parts
How a pedometer works
Setting up our hardware
Counting steps with Python
Making our program run automatically
Summary
8
Creating Your Own Heart Rate Monitor
Creating Your Own Heart Rate Monitor
What we will cover
The bill of parts
Setting up our hardware
Reading our heart rate
Making our program run automatically
Summary
9
Creating Your Own GPS Tracker
Creating Your Own GPS Tracker
What we will cover
The bill of parts
Setting up our hardware
Configuring our Pi Zero to connect to the hardware
Reading our GPS data
Creating KML files
Creating our final program
Making our program run automatically
Testing our GPS tracker
Summary

Reading our heart rate

Now that we have connected all of our hardware, we should first check whether we can see all of our devices on the I2C bus. Switch on your Pi Zero, and connect to over SSH. Once you are logged in, run the following command to check the devices detected on the I2C bus – i2cdetect -y 1. You should see the same as this:

This is telling us that we can see five different devices on our I2C bus:

  • 0x49: Enviro pHAT - ADS1015
  • 0x29: Enviro pHAT - TCS3472
  • 0x1d: Enviro pHAT - LSM303D
  • 0x77: Enviro pHAT - BMP280
  • 0x74: Scroll pHAT HD

If you cannot see these five devices on your I2C bus, then you need to go back and check whether your wiring matches the diagram and that your solder joints are all good.

We now need to install some pieces of software to interface with our hardware. Let's start with the software for the Enviro pHAT, type the following command...

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