IoT based Projects

Realization with Raspberry Pi, NodeMCU and Arduino

Rajesh Singh

• Publisher: BPB Publications
• Year: 2020
• ISBN:
  9789389328523
• Topic: Computer Science
• Subtopic: Computer Networking
• Index: Computer Science

Create your own IoT projects KEY FEATURES

• Comprehensive coverage of various aspects of IoT concepts
  
• Covers various Arduino boards and shields
  
• Simple language, crystal clear approach and straight forward comprehensible presentation
  
• Adopting user-friendly style for the explanation of circuits and examples
  
• Includes basics of Raspberry Pi and related projects DESCRIPTION
  The book has been written in such a way that the concepts are explained in detail. It is entirely based on the practical experience of the authors while undergoing projects with students and industries, giving adequate emphasis on circuits and code examples. To make the topics more comprehensive, circuit diagrams, photographs and code samples are furnished extensively throughout the book. The book is conceptualized and written in such a way that the beginner readers will find it very easy to understand and implement the circuits and programs. The objective of this book is to discuss the various projects based on the Internet of Things (IoT). WHAT YOU WILL LEARN
  
• Internet of Things, IoT-Based Smart Camera, IoT-Based Dust Sampler
  
• Learn to create ESP8266-Based Wireless Web Server and Air Pollution Meter Using Raspberry Pi, Smart Garage Door, Baggage Tracker, Smart Trash Collector, Car parking system, Home Automation
  
• Windows 10 on Raspberry and know to create Wireless Video Surveillance Robot Using Raspberry Pi WHO THIS BOOK IS FOR
  Students pursuing BE/BSc/ME/MSc/BTech/MTech in Computer Science, Electronics, Electrical. TABLE OF CONTENTS
  1. ESP8266-Based Wireless Web Server
  2. Air Pollution Meter Using Raspberry Pi
  3. Smart Garage Door
  4. Baggage Tracker
  5. Smart Trash Collector
  6. Car parking system
  7. Home Automation
  8. Environmental Parameter Monitoring
  9. Intelligent System for the Blind
  10. Sign to Speech Using the IoTs
  11. Windows 10 on Raspberry
  12. Wireless Video Surveillance Robot Using Raspberry Pi
  13. IoT-Based Smart Camera
  14. IoT-Based Dust Sampler and Air Quality Monitoring System AUTHOR BIO
  Dr. Rajesh Singh is currently associated with Lovely Professional University as a professor with more than sixteen years of experience in academics. Dr. Anita Gehlot is currently associated with Lovely Professional University, Punjab, as an associate professor with more than twelve years of experience in academics. Dr. Lovi Raj Gupta is the Executive Dean, Faculty of Technology & Sciences, Lovely Professional University. Ms. Navjot Rathour is associated with Lovely Professional University as an assistant professor with more than eight years of experience in academics. Mahendra Swain is a PhD Scholar at Lovely Professional University, Jalandhar, Punjab. He has completed his B.Tech in ECE from Centurion University of Technology and Management, Bhubaneswar. He has completed his M.Tech from Lovely professional University. Bhupendra Singh is the Managing Director of Schematics Microelectronics and provides Product design and R&D support to industries and Universities.
  

CHAPTER 1

ESP8266-based Wireless Web Server

The ESP8266 is a low-cost Wi-Fi microchip with full TCP/IP stack manufactured in 2014. This chapter discusses the open source platform, NodeMCU with ESP8299 WiFi SoC. The circuit diagram and interfacing steps are discussed to understand the working of NodeMCU to control the home appliances with the web server.

Introduction

To understand the interfacing of NodeMCU, a system is designed to control the home appliances with the local server. NodeMCU is an open source IoT platform. It includes firmware which runs on the ESP8266 Wi-Fi SoC. NodeMCU, as shown in Figure 1.1, provides access to the GPIO (General Purpose Input/Output):

Figure 1.1: NodeMCU

For developing purposes, the pin description is shown in following Table 1.1:

Table 1.1: ESP8266 pin description

The home appliances can be controlled with NODEMCU through relays. Figure 1.2 shows the detailed block diagram of the system and Table 1.2 shows the component list required for the system. It shows the block diagram of the system. It comprises NodeMCU, LCD, power supply, and electrical appliances:

Figure 1.2: Block Diagram

Table 1.2 shows the list of components required to design the system:

Component/Specification	Quantity
Power supply 12V/1Amp	1
Node MCU	1
Solid state relay board	4
Extension board for four appliances	4
Power supply extension	1
ISP programmer	1
LCD16*2	1
LCD patch	1
+5V power supply	1

Table 1.2: Components List

Circuit diagram

The circuit diagram of the system is shown in Figure 1.3 and the description of the system is as follows:

• NodeMCU D0 pin is attached to RS pin of LCD
• RW pin of LCD is connected to Ground
• NodeMCU D1 pin is attached with E pin of LCD
• NodeMCU D2 pin is attached with D4 pin of LCD
• NodeMCU D3 is attached with D5pin of LCD
• NodeMCU D4 pin is attached with D6 pin of LCD
• NodeMCU D5 pin is attached with D7 pin of LCD
• Pin 1 and pin 16 of LCD is connected with Ground
• Pin 2 and pin 15 of LCD is connected with +Vcc

Figure 1.3: Circuit diagram

Program

Let’s see the following program:

//for hot spot

#include <ESP8266WiFi.h>

#include <WiFiClient.h>

#include <ESP8266WebServer.h>

#include <ESP8266mDNS.h>

int Analog = A0;

#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins

LiquidCrystal lcd(D0, D1, D2, D3, D4, D5);

//for hotspot

MDNSResponder mdns;

const char* ssid = “ESPServer_RAJ”; // add your credentials here

const char* password = “RAJ@12345”;

String webString=””;

ESP8266WebServer server(80);

String webPage = “”;

String web=””;

int pin1 = D6; // assign integer to pin D6

int pin2 = D7; // assign integer to pin D7

int pin3 = D8; // assign integer to pin D8

int pin4 = D0; // assign integer to pin D0

int TEMP_level=0; // assume variable

void setup()

{

lcd.begin(20, 4); // initialize LCD

lcd.print(“robot Monitoring”); // print string on LCD

webPage +=”<h2>ESP8266 Web Server new</h2><p>TEMP METER <a href=\”TEMP\”><button> TEMPERATURE (oC)</button></a></p>”;// for temperature

webPage += “<p>BULB-STATUS <a href=\”BULBON\”><button>ON</button></a>&nbsp;<a href=\”BULBOFF\”><button>OFF</button></a></p>”;

webPage += “<p>FAN-STATUS <a href=\”FANON\”><button>ON</button></a>&nbsp;<a href=\”FANOFF\”><button>OFF</button></a></p>”;

webPage += “<p>EXHAUST FAN-STATUS <a href=\”EXHAUSTFANON\”><button>ON</button></a>&nbsp;<a href=\”EXHAUSTFANOFF\”><button>OFF</button></a></p>”;

webPage += “<p>GYSER-STATUS <a href=\”GYSERON\”><button>ON</button></a>&...

Table of contents

• Cover Page
• Title Page
• Copyright Page
• About the Authors
• Acknowledgement
• Preface
• Errata
• Table of Contents
• 1. ESP8266-based Wireless Web Server
• 2. Air Pollution Meter Using Raspberry Pi
• 3. Smart Garage Door
• 4. Baggage Tracker
• 5. Smart Trash Collector
• 6. Car Parking System
• 7. Home Automation
• 8. Environmental Parameter Monitoring
• 9. Intelligent System for the Blind
• 10. Sign-in to Speech Using the IoTs
• 11. Windows 10 on Raspberry
• 12. Wireless Video Surveillance Robot Using Raspberry Pi
• 13. IoT-based Smart Camera
• 14. IoT-based Air Quality Monitoring System Using NodeMCU