- The first
LED.strobe()
parameter defines the blinking speed of LED, which is 100 ms by default. If the argument is defined as 500 then the blink will go in 500 ms intervals. - The second line of argument use
require
function to pull in thejohnny-five
modules. - Johnny-Five LED objects are output only and therefore do not emit any events.
- Raspberry Pi pin P1-29 translate to GPIO 5 in terms of GPIO#.
LED.blink()
function is an alias toLED.strobe()
function.- We begin with constructing a board object, and we pass a new instance of the
raspi-io
module in as its I/O. This is how we tell the Johnny-Five library we're running this code on a Raspberry Pi.
Hands-On Robotics with JavaScript
By :
Hands-On Robotics with JavaScript
By:
Overview of this book
JavaScript has an effective set of frameworks and libraries that provide support for embedded device programming and the robotics ecosystem. You’ll be able to put your JavaScript knowledge to work with this practical robotics guide.
The book starts by guiding you in setting up an environment to program robots with JavaScript and Rasberry Pi 3. You will build beginner-level projects, such as a line-following robot, and then upgrade your robotics skills with a series of projects that help you get to grips with the Johnny-Five library. As you progress, you’ll learn how you can improve your projects by enabling advanced hardware components and programming concepts. You’ll even build an advanced AI-enabled robot, connect its NodeBots to the internet, create a NodeBots Swarm, and explore Message Queuing Telemetry Transport (MQTT).
By the end of this book, you will have enhanced your robot programming skills by building a range of simple to complex projects.
Table of Contents (19 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Free Chapter
Setting Up Your Development Environment
Creating Your First Johnny-Five Project
Building Interactive Projects with RGB LED
Bringing in Input with Buttons
Using a Light Sensor to Create a Night-Light
Using Motors to Move Your Project
Using Servos for Measured Movement
The Animation Library
Getting the Information You Need
Using MQTT to Talk to Things on the Internet
Building a NodeBots Swarm
Assessments
Other Books You May Enjoy
Index
Customer Reviews