Internet of Things Programming with JavaScript

Internet of Things Programming with JavaScript

Overview of this book

The Internet of Things is taking the tech world by storm, and JavaScript is at its helm. This book will get you to grips with this exciting new technology. Where do Node.js, HTML5 and Windows 10 IoT Core come in with JavaScript and IoT? Why Raspberry Pi Zero rather than Arduino? How do you configure and build an IoT network from scratch? All your IoT JavaScript questions are answered in this book.

Internet of Things Programming with JavaScript

Credits

About the Author

www.packtpub.com

Customer Feedback

Preface

Free Chapter

Getting Started with Raspberry Pi Zero

Setting up Raspberry Pi Zero

Connecting to the home network and accessing remotely

How to install the wireless tools

Testing the communication

Updating the package repository

Remote Desktop

Configuring a web server

Testing the PHP installation

Summary

Connecting Things to the Raspberry Pi Zero

Connectting digital input - sensor DS18B20

Configuring the one-wire protocol

Connecting analog inputs using an MCP3008 ADC Converter

Raspberry Pi GPIO header

Putting the real-time clock to final test

Summary

Connecting Sensors - Measure the Real Things

Measuring flow sensor to calculate the volume of water

Reading and counting pulses with Arduino

Calculating water flow rate based on the pulses counted

Calculating flow and volume of water:

Measuring the concentration of gas

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

Detecting motion with a PIR sensor

Detecting if the door is open with a reed switch

Detecting who can get in the house with a fingerprint sensor

Summary

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

Controlling the relay using aREST commands from a web browser

Configuring Node.js on a computer as a web server

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

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

Summary

Adding a Webcam to Monitor Your Security System

Interaction between Arduino and Raspberry Pi

Arduino interface in Raspian

Controlling an output connected to Arduino from Raspberry Pi Zero

Controlling the Arduino board from Python

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

Controlling your camera from a web page

Monitoring your USB camera for security in a network

Summary

Building a Web Monitor and Controlling Devices from a Dashboard

Configuring MySQL database server

Installing PhpMyAdmin for administrating databases

Datalogger with MySQL

Data queries from the database

Controlling and dimming a LED

Controlling the speed of a DC motor

Controlling Lights with electrical circuits

Other appliances

Remote access from anywhere to your Raspberry Pi Zero

Controlling lights and measuring current consumption

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

Summary

Building a Spy Police with the Internet of Things Dashboard

Spy microphone that detects noise

Regulating the current of an AC lamp dimmer

Controlling access with an RFID card

Detecting smoke

Building an alarm system using the Raspberry Pi Zero

Monitoring the climate from a remote dashboard

Summary

Monitoring and Controlling Your Devices from a Smart Phone

Controlling a relay from a smart phone using APP Inventor

Creating our first application

Reading JSON response in Android Studio using ethernet shield

Android application

Controlling a DC motor using an Android Application

Controlling outputs from android using your Raspberry Pi Zero

Controlling outputs with Raspberry Pi via Bluetooth

Summary

Putting It All Together

Integrating the system - development projects

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

Controlling the door lock with a keypad

Integrating the system control with relays and devices

How to set up the power supplies

Summary

Customer Reviews

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Building an alarm system using the Raspberry Pi Zero

In this section, we will build a simple alarm system with a PIR sensor connected to the Raspberry Pi Zero. This is an important project as it can be added to the home, including other sensors, in order to monitor it.

Motion sensor with Raspberry Pi Zero

For this project we need the Raspberry Pi Zero, a motion sensor PIR, and some cables. The hardware configuration for this project will actually be very simple. First, connect the VCC pin of the motion sensor to a 3.3V pin on the Raspberry Pi. Then, connect the GND pin of the sensor to one GND pin on the Pi. Finally, connect the OUT pin of the motion sensor to the GPIO17 pin on the Raspberry Pi. You can refer to the previous chapters to find out about pin mapping on the Raspberry Pi Zero board.

The following image shows the final circuit with the connections:

Software code

You can now either copy the code inside the folder called Project1, or just get the complete code from the folder for this...

Internet of Things Programming with JavaScript

Internet of Things Programming with JavaScript

Overview of this book

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Software code