Book Image

Hands-On Robotics with JavaScript

By : Kassandra Perch
Book Image

Hands-On Robotics with JavaScript

By: Kassandra Perch

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
Index

Setting up MQTT on the Pi with AdafruitIO


In order to set up MQTT, we'll need a broker. While the Pi can itself serve as a broker (see the Further reading section), we don't need broker functionality on the Pi. We can use AdafruitIO to create a broker that we can subscribe to topics with on our Pi. 

 

Creating an account and a feed

First, we'll go to https://io.adafruit.com/ and create a free account. Then, you'll be taken to a dashboard:

We'll need to set up a feed and get our AIO key in order to get started on the Pi. To set up a feed, select Feeds in the left-hand menu. Then, click the Actions button in the upper left corner:

Next, select Create New Feed from the dropdown. Name your feed (I named mine hands-on-robotics-with-js to make it easy to remember what I created it for). Then, you'll be taken to your new feed's page:

Now that we've created our feed, we can get all the information we need to get the Pi hooked up to it. First, let's get the Feed key to give to the MQTT module. Click Feed...