Hands-on robotics with JavaScript build robotic projects using Johnny-five and control hardware with Javascript and Raspberry Pi
Leverage Raspberry Pi 3 and different JavaScript platforms to build exciting Robotics projects Key Features Build robots that light up and make noise Learn to work with Raspberry Pi 3 and JavaScript Connect your Johnny-Five projects to external APIs and create your own IoT Book Description There has...
| Other Authors: | |
|---|---|
| Format: | eBook |
| Language: | Inglés |
| Published: |
Birmingham ; Mumbai :
Packt
2018.
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| Edition: | 1st edition |
| Subjects: | |
| See on Biblioteca Universitat Ramon Llull: | https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009630704706719 |
Table of Contents:
- Cover
- Title Page
- Copyright and Credits
- Dedication
- Packt Upsell
- Contributors
- Table of Contents
- Preface
- Chapter 1: Setting Up Your Development Environment
- Technical requirements
- What is the Raspberry Pi?
- Microcontrollers
- General-Purpose Input/Output (GPIO) pins
- Debian and Raspbian
- Johnny-Five and Raspi-IO
- So, the Pi is technically a microcontroller...
- ...but it is also a computer!
- How we will use the Raspberry Pi
- Taking advantage of all that the Raspberry Pi has to offer!
- Johnny-Five - letting us code hardware in Node.js
- Installing the operating system
- Downloading Raspbian Lite
- Burning the image to an SD card
- Editing files on the SD card
- Booting up the Pi
- SSHing from a Linux or Mac
- SSHing from Windows
- Setting up your password and hardware interfaces
- First things first - change your password!
- Updating the Raspberry Pi
- Turning on the hardware interfaces
- Installing Node.js, Johnny-Five, and Raspi-IO
- Installing Node.js and npm
- Detecting your version of ARM processor
- Installing Johnny-Five and Raspi-IO
- Summary
- Questions
- Further reading
- Chapter 2: Creating Your First Johnny-Five Project
- Technical requirements
- Creating a project folder
- Setting up npm to manage our modules
- Getting started with Johnny-Five and Raspi-IO
- Gathering resources and documentation
- Taking a look at the LED-blink project
- Raspberry Pi pin numbers
- Wiring up an LED
- Putting together and attaching the cobbler
- Attaching the resistor and LED
- Making the LED blink
- Putting your code on the Raspberry Pi
- Running your code
- Summary
- Questions
- Further reading
- Chapter 3: Building Interactive Projects with RGB LED
- Technical requirements
- Looking at the LED and LED.RGB API
- The LED object
- The Led.RGB object.
- PWM pins and GPIO expanders
- How do PWM pins work?
- Why we need a GPIO expander
- Wiring up our GPIO expander and RGB LED
- Bringing in other node packages
- Project - building a rainbow
- Using the color npm module
- Getting our Johnny-Five code started
- The REPL - a powerful tool in Johnny-Five
- How does the REPL work?
- Adding our RGB LED to the REPL
- Controlling our LED from the command-line interface
- Summary
- Questions
- Further reading
- Chapter 4: Bringing in Input with Buttons
- Technical requirements
- Using inputs in robotics projects
- Digital versus analog input
- How to handle analog input with the Raspberry Pi
- Analog GPIO expanders
- Using input devices with digital interfaces
- How Johnny-Five handles input
- The structure of a typical Johnny-Five project
- The beginning - including libraries and creating our board object
- The board ready event handler
- Constructing our component objects
- Input event handlers and output device manipulation
- The Johnny-Five button object
- The button object
- Button events
- Wiring up buttons
- Putting a button on a breadboard
- Using a pull-down resistor
- Adding buttons to our RGB LED project
- Wiring everything up
- Using the power and ground side rails
- Wiring up the buttons
- Button 1 - stop and start rainbow
- Refactoring the rainbow cycle
- Button 2 - next color
- Summary
- Questions
- Further reading
- Chapter 5: Using a Light Sensor to Create a Night-Light
- Technical requirements
- Using an analog sensor with the Pi
- Finding the right sensors for your Pi project
- I2C devices
- SPI
- How to determine if your sensor will work with Johnny-Five
- The ambient light sensor
- Wiring up the sensor
- Writing a program to get readings and print them to the command line
- The Johnny-Five sensor events.
- Handling sensor data in the event handler
- Using and formatting Johnny-Five sensor data
- Using .scaleTo() and .fscaleTo() to fine-tune measurements
- Printing sensor data to the command line
- Using barcli to make the data easier to see
- Importing barcli and constructing our barcli graph
- Getting the bar graph to update
- Creating our night-light
- Wiring up the LED
- Coding this project
- Summary
- Questions
- Further reading
- Chapter 6: Using Motors to Move Your Project
- Technical requirements
- More about motors
- How to control a motor with a microcontroller
- Preparing for a motor-driven project with Raspberry Pi
- Putting the hat together
- Putting the hat on the Pi
- The Johnny-Five motor object
- Constructors for our hat
- Functions that move the motor
- Adding REPL control
- Loading and running your motor
- Troubleshooting your motorized projects
- Project - cat toy
- Putting a piece of paper on the motor shaft
- Coding the randomness to start/stop the motor
- Project - using two gearbox motors and the motors object
- Wiring up your TT motors
- The motors Johnny-Five object
- Writing some functions
- Running our motors project
- Summary
- Questions
- Chapter 7: Using Servos for Measured Movement
- Technical requirements
- Differences between motors and servos
- Calculated movements
- Regular versus continuous servos
- Powering servos and motors
- Getting a servo working with Johnny-Five
- The Johnny-Five servo object
- Wiring the servo to our PWM hat
- Coding your first servo sweep
- Project - two servos and the REPL
- Wiring up a second servo
- Using the Johnny-Five servos object
- Adding the Servos object to our code
- Adding in REPL functionality
- Playing with our servos on the command line
- Project - light meter with the servo
- Adding in the light sensor.
- Making the servo into a meter
- Coding the project
- Running and using our light meter
- Project - the continuous servo
- Wiring up the servo
- Continuous servo constructor and methods
- Using the REPL with the continuous servo
- Playing with the continuous servo in the REPL
- Summary
- Questions
- Chapter 8: The Animation Library
- Technical requirements
- Animating movement
- Why we need the animation library
- Moving servos with true precision
- Implicit use of the animation library
- Using servo.to() to implicitly create an animation
- Playing with implicit animations
- Playing with implicit animations, take two
- The terminology of the animation library
- The construction of the animation object
- Creating the animation object
- Planning out the animation sequence
- Creating keyframes
- Using null and false as positions in keyframes
- Programming our keyframes
- Setting cue points and duration
- Putting it all together to make an animation
- Watching your animation at work
- Easing into your servo animations
- How easing fits into an animation segment
- Adding easing to our first animation
- Easing an entire animation segment
- Learning more about queuing and playing animation segments
- Looping animation segments
- Changing the speed of animation segments
- Playing, pausing, and stopping animation segments
- Tying it all together in the REPL
- Summary
- Questions
- Chapter 9: Getting the Information You Need
- Technical requirements
- Why connect your NodeBots to the internet?
- Using the power of npm modules
- Using the data you collect
- Some things to keep in mind
- Getting weather data on our Pi with OpenWeatherMap
- Getting an OpenWeatherMap API key
- Bringing in request
- Parsing the response
- Building a weather dashboard with an LCD
- Adding an LCD to the Pi
- The LCD object.
- Constructing our LCD
- Setting up the LCD
- Printing to and clearing the LCD
- Coding it all together
- Project - scraping data from websites with your Pi
- Scraping downforeveryoneorjustme.com for johnny-five.io
- Making the HTTP request
- Using Cheerio to get the element we want
- Parsing the HTML and showing the result
- Summary
- Questions
- Further reading
- Chapter 10: Using MQTT to Talk to Things on the Internet
- Technical requirements
- IoT device communications
- Long polling
- Websockets
- MQTT - an IoT PubSub protocol
- The basics of MQTT
- Setting up MQTT on the Pi with AdafruitIO
- Creating an account and a feed
- Subscribing to the feed using the mqtt npm module
- The mqtt module
- The dotenv module
- Testing our connection
- Project - adding an LCD and button to see and send MQTT events
- Wiring it all up
- Coding it all together
- Project - social media notifier bot with IFTTT
- Getting started with IFTTT
- Linking IFTTT to Adafruit
- Setting up feeds for your social media MQTT messages in AdafruitIO
- Creating our IFTTT Applets
- Wiring up our project
- Coding our social media notifications to show on the LCD
- Running your social media bot
- Summary
- Questions
- Further reading
- Chapter 11: Building a NodeBots Swarm
- Technical requirements
- Project - connecting multiple NodeBots
- Optional - setting up a second Raspberry Pi
- Setting up your project files and folders
- If you're using one Pi
- If you're using two Pis
- Adding a light sensor to the Pi
- Creating an MQTT broker on the Pi
- Programming the MQTT client - have the Pi Report Home
- If you're using one Pi
- If you're using two Pis
- Running our MQTT project
- If you're using one Pi
- If you're using two Pis
- Expanding your NodeBots knowledge
- Using Johnny-Five on other boards
- Figuring out pin numbers.
- Checking the platform support page.
