- Two ways IoT devices interface with the internet that aren't specific to IoT are HTTP/S and WebSockets.
- MQTT stands for Message Queueing Telemetry Transport.
- An MQTT client is capable of connecting to a broker, subscribing to topics, process incoming messages to topics they are subscribed to, and publishing to topics.
- An MQTT broker is capable of letting MQTT clients connect, making sure published messages go to all clients that are subscribed to the message's topic, and publishing messages to any topic.
- The Pi gets a copy of the messages we send to AdafruitIO because it is subscribed to the topic it is publishing to, and every device subscribed to the topic is sent the message by the broker.
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