Internet of Things Programming with JavaScript

Table of Contents

Internet of Things Programming with JavaScript

Credits

About the Author

www.packtpub.com

Why subscribe?

Customer Feedback

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Getting Started with Raspberry Pi Zero

Setting up Raspberry Pi Zero

Preparing the SD card

Installing the Raspbian operating system

Debugging your Raspberry Pi Zero with a serial console cable

Testing and accessing the serial COM interface

Connecting to the home network and accessing remotely

Connecting with an Ethernet adapter

Accessing the Raspberry Pi Zero via SSH

Connecting to the Wi-Fi network

How to install the wireless tools

Configuring IP address and wireless network

Testing the communication

Ping from a computer

Updating the package repository

Remote Desktop

Remote Desktop with Windows

Configuring a web server

Testing the PHP installation

Summary

2. Connecting Things to the Raspberry Pi Zero

Connectting digital input - sensor DS18B20

Hardware requirements

Hardware connections

Configuring the one-wire protocol

Software configuration

Displaying the readings on the screen

Connecting analog inputs using an MCP3008 ADC Converter

Raspberry Pi GPIO header

Reading the data with a Python script

Connecting an RTC

I2C setup

DS3231 module setup

Hardware setup

Testing the RTC

I2C device setup

Putting the real-time clock to final test

Summary

3. Connecting Sensors - Measure the Real Things

Measuring flow sensor to calculate the volume of water

Hardware connections

Reading the sensor signal

Reading and counting pulses with Arduino

Calculating water flow rate based on the pulses counted

Calculating flow and volume of water:

Displaying the parameters measured on an LCD

Measuring the concentration of gas

Connections with the sensor and Arduino board

Measuring the level of alcohol with a sensor

Detecting fire with a sensor

Measuring the humidity for plants

Measuring the level of water in a recipient

Measuring temperature, humidity, and light and displaying data on an LCD

Hardware and software requirements

Testing sensors

Displaying data on the LCD

Detecting motion with a PIR sensor

PIR sensor interfaced with Arduino

Detecting if the door is open with a reed switch

Detecting who can get in the house with a fingerprint sensor

Hardware configuration:

Save the fingerprint:

Testing the sensor

Summary

4. Control-Connected Devices

Making a simple web server with Node.js

Controlling a relay from a Raspberry Pi Zero using Restful API and Node.js

JSON structure

Commands with the aREST API

Installing Node.js on your Raspberry Pi Zero

Controlling the relay using aREST commands from a web browser

Configuring the web server

Configuring Node.js on a computer as a web server

Downloading Node.js

Installing Node.js

Configuring web server port 8080 with Node.js

Monitoring temperature, humidity, and light using Node.js with Arduino Wi-Fi

Connecting to the Wi-Fi network

Monitoring temperature, humidity, and light using Node.js with Arduino Ethernet

Code for the application of the Arduino Ethernet shield

Configuring the device in Node.js

Summary

5. Adding a Webcam to Monitor Your Security System

Interaction between Arduino and Raspberry Pi

Installing Arduino IDE in Raspbian

Remote access to Raspberry Pi

Executing Arduino in a graphical interface

Arduino interface in Raspian

Preparing the interface

Selecting the serial port

Downloading a sketch from the graphical interface

Controlling an output connected to Arduino from Raspberry Pi Zero

Controlling the Arduino board from Python

Hardware connections

Connecting a TTL serial camera to Arduino and saving pictures to a micro SD

Detecting motion with the serial TTL camera

Controlling a snapshot from Raspberry Pi

Code for the function to take a picture

Controlling your camera from a web page

Calling the Python scripts from PHP

Code for Python scripts

Monitoring your USB camera for security in a network

Configuring Arduino YUN

Monitoring from the MJPG-STREAMER server

Monitoring the USB camera from the Raspberry Pi

Summary

6. Building a Web Monitor and Controlling Devices from a Dashboard

Configuring MySQL database server

Installing MySQL

Installing MySQL driver for PHP

Testing PHP and MySQL

Installing PhpMyAdmin for administrating databases

Configuring the Apache server

Entering to the phpMyAdmin remote panel

Showing the Arduinobd database

Sending data from Arduino and the Ethernet shield to the web server

Datalogger with MySQL

Programming the script software

Testing the connection

Data queries from the database

Software for the scripts

Scripts for specific data to be displayed

Query for recording temperature

Controlling and dimming a LED

Software requirements

Testing the LED

Controlling the LED from an interface

Controlling the speed of a DC motor

Controlling Lights with electrical circuits

Electrical appliances

Other appliances

Control a door lock

Control watering plants

Remote access from anywhere to your Raspberry Pi Zero

How to access our modem to configure it

Configuring Dynamic DNS

Creating an account at No-ip.org

Controlling lights and measuring current consumption

Building the interface to control and monitor

Installing Jade for Node.js

Interface for controlling and monitoring

Controlling and monitoring Arduino, Wi-Fi, and Ethernet shields on connected devices and sensors

Building the code to control and monitor devices from a single interface

Adding the devices to monitor and control

Summary

7. Building a Spy Police with the Internet of Things Dashboard

Spy microphone that detects noise

Software code

Regulating the current of an AC lamp dimmer

Hardware requirements

Software code

Controlling access with an RFID card

Hardware requirements

Software requirements

Software code

Detecting smoke

Software code

Building an alarm system using the Raspberry Pi Zero

Motion sensor with Raspberry Pi Zero

Software code

The alarm module

Software code

Central interface

Graphical interface

Monitoring the climate from a remote dashboard

Exploring the sensor test

Configuring the remote dashboard (Dweet.io)

Summary

8. Monitoring and Controlling Your Devices from a Smart Phone

Controlling a relay from a smart phone using APP Inventor

Hardware requirements

Software requirements

Creating our first application

Designing the interface

Communicating APP Inventor with Arduino ethernet shield

Code for APP Inventor

Reading JSON response in Android Studio using ethernet shield

Android application

Java class

Permission of the application

Controlling a DC motor using  an Android Application

Hardware requirements

Controlling outputs from android using your Raspberry Pi Zero

Controlling outputs with Raspberry Pi via Bluetooth

Controlling lights from an Android Application

Summary

9. Putting It All Together

Integrating the system - development projects

Getting into the details of light sensor

Motion sensor

Automatic light controller

Solar power monitor circuit

Automatic irrigation system with a soil sensor

Arduino water-level controller

Bluetooth based home automation

Controlling access with a matrix keyboard

The keypad

Connecting an LCD screen to display the code

Controlling the door lock with a keypad

 Code to access using the keypad

Integrating the system control with relays and devices

Controlling multiple appliances

The complete system

How to set up the power supplies

Power supply for AC loads

Connecting a relay of 24 DC volts to the Arduino board

Summary

Internet of Things Programming with JavaScript

Internet of Things Programming with JavaScript

Copyright © 2017 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: February 2017

Production reference: 1150217

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham 

B3 2PB, UK.

ISBN 978-1-78588-856-4

www.packtpub.com

Credits

About the Author

Rubén Oliva Ramos is a computer systems engineer, with a master's degree in computer and electronic systems engineering, teleinformatics and networking specialization from University of Salle Bajio in Leon, Guanajuato Mexico. He has more than five years of experience in: developing web applications to control and monitor devices connected with Arduino and Raspberry Pi using web frameworks and cloud services to build Internet of Things applications.

He is a mechatronics teacher at University of Salle Bajio and teaches students on the master's degree in Design and Engineering of Mechatronics Systems. He also works at Centro de Bachillerato Tecnologico Industrial 225 in Leon, Guanajuato Mexico, teaching the following: electronics, robotics and control, automation, and microcontrollers at Mechatronics Technician Career. He has worked on consultant and developer projects in areas such as monitoring systems and datalogger data using technologies such as Android, iOS, Windows Phone, Visual Studio .NET, HTML5, PHP, CSS, Ajax, JavaScript, Angular, ASP .NET databases (SQlite, mongoDB, and MySQL), and web servers (Node.js and IIS). Ruben has done hardware programming on Arduino, Raspberry Pi, Ethernet Shield, GPS and GSM/GPRS, ESP8266, and control and monitor systems for data acquisition and programming.

"I want to thank God for helping me writing this book and his inspiration, to my wife, Mayte, and my sons, Ruben and Dario, for their support while writing this book and in general for their support in all my projects. To my parents, my brother and sister whom I love.

I hope this book covers the main topics for students that want to learn more about Internet of Things projects, and all the prerequisites for building this kind of application."

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