Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Internet of Things Projects with ESP32
Internet of Things Projects with ESP32

Internet of Things Projects with ESP32: Build exciting and powerful IoT projects using the all-new Espressif ESP32

eBook
€13.98 €19.99
Paperback
€24.99
Subscription
Free Trial
Renews at €18.99p/m

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Product feature icon AI Assistant (beta) to help accelerate your learning
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Table of content icon View table of contents Preview book icon Preview Book

Internet of Things Projects with ESP32

Making Visual Data and Animation on an LCD

The ESP32 chip and module consists of general-purpose input/output (GPIO) pins to enable sensing and actuating. In this chapter, we will learn how to read sensor data from the ESP32 GPIO. We will also talk about using an LCD to display data with the ESP32 chip. In addition to this, we will show sensory information such as temperature and humidity in the LCD. Ultimately, we will build a simple IoT weather monitoring system with the ESP32 board.

We will see how to work with an LCD by following step-by-step instructions. You will also learn how to use the ESP32 board to detect the weather and display it on LCD by the end of this chapter.

The following topics will be covered in this chapter:

  • Introduction to ESP32 GPIO
  • Introduction to IoT for weather monitoring systems
  • Reading temperature and humidity from a sensor device
  • Displaying information...

Technical requirements

Before we begin, make sure that you have the following things ready:

  • A computer with an OS, such as Windows, Linux, or Mac, installed.
  • An ESP32 development board. The ESP-WROVER-KIT board from Espressif is recommended.
  • An ESP32 development environment configured on your computer.

  • An DHT22 sensor module.
  • The CoolTerm tool, which can read and write data over serial communication (UART). This is available for Windows, Linux, and Mac. We set our serial tool to the ESP32 board with Baudrate 115200.

Introduction to ESP32 GPIO

The ESP32 chip features forty physical GPIO pads. Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. For development boards based on the ESP32 chip or module, some board makers probably expose all ESP32 GPIO pins. However, some board makers also expose ESP32 GPIO pins but add additional pins such as battery, voltage, exclusive sensor, and ground.

Since there are many ESP32 development board models, we cannot explore all board models. Instead, we will focus on the ESP-WROVER-KIT board from Espressif.

We can access GPIO pins on the ESP-WROVER-KIT board with three locations. You can see these locations from the ESP-WROVER-KIT board in the following image. Some GPIO labels are shown in the board body so that we can see all of the GPIO pins:

Figure 2-1: GPIO pins from an ESP-WROVER-KIT board

Some GPIO pins are used for...

Introduction to IoT for weather monitoring systems

A weather monitoring system senses the state of the atmosphere, such as its temperature, humidity, and weather conditions (clear, stormy, and so on). To get the state of the atmosphere, we need sensors.

We can design a simple model for an IoT weather monitoring system as shown next in Figure 2-2. An IoT board with sensor devices can sense physical conditions such as temperature and humidity. Some IoT weather monitoring systems can display their sensor values on a monitor or LCD display:

Figure 2-2: A simple model for an IoT weather Monitoring System

Now that we've discussed the weather monitoring system and its basic architecture, let's start building our weather monitoring system. In the next section, we'll learn how to read temperature and humidity using a sensor device and an ESP32 board.

...

Reading temperature and humidity from a sensor device

In this section, we'll build a simple program to read temperature and humidity from sensor devices. We'll use the DHT22 sensor module for this. This sensor device is easy to find on online stores such as Adafruit, SparkFun, and AliExpress.

Our project scenario is to read temperature and humidity values from a sensor device. Then, we will print sensor values on a serial Terminal. After doing this, we will implement our hardware wiring and develop a program.

Wiring

Let's begin by exploring the DHT22 sensor module. This module can sense temperature and humidity. In general, the DHT22 has four pins. You can see the sensor pinout in Figure 2-3:

Figure 2-3: A...

Displaying information using an LCD

Hardware wiring

If you have the ESP-WROVER-KIT board, you don't need an additional LCD to perform hardware wiring. Otherwise, if you use another LCD module, you can connect the LCD module to the ESP32 board via ESP32 SPI pins...

Making a weather monitoring system

In this section, we'll build a simple weather monitoring system. We'll use the skills that we've learned about, such as reading temperature and humidity from a DHT22 sensor device. Ultimately we'll be able to display the temperature and humidity on the LCD after reading from the sensor device.

Let's begin by creating a project.

Creating a project

To simplify our weather monitoring system project, we will copy the previous project named lcddemo and create a project called weather. Our main program is weather.c on the main folder. You can see a project structure shown in figure 2-16:

Figure 2-16: Project structure for the weather system

Now, let's move on to hardware...

Summary

In this chapter, we looked at a brief introduction that weather systems. Here, we made a simple ESP32 program to sense temperature and humidity using the DHT22 sensor module. Furthermore, we worked with the LCD on the ESP32 board, and were able to access the LCD modules through the ESP32 board. Lastly, we also displayed temperature and humidity data from a sensor to the LCD display. You can now compile and flash any program to your ESP32 board.

In the next chapter, we will learn how to build a simple game on an ESP32 board. We will also cover gaming-embedded systems.

Further reading

Left arrow icon Right arrow icon
Download code icon Download Code

Key benefits

  • Getting to know the all new powerful EPS32 boards and build interesting Internet of Things projects
  • Configure your ESP32 to the cloud technologies and explore the networkable modules that will be utilised in your IoT projects
  • A step-by-step guide that teaches you the basic to advanced IoT concepts with ESP32

Description

ESP32 is a low-cost MCU with integrated Wi-Fi and BLE. Various modules and development boards-based on ESP32 are available for building IoT applications easily. Wi-Fi and BLE are a common network stack in the Internet of Things application. These network modules can leverage your business and projects needs for cost-effective benefits. This book will serve as a fundamental guide for developing an ESP32 program. We will start with GPIO programming involving some sensor devices. Then we will study ESP32 development by building a number of IoT projects, such as weather stations, sensor loggers, smart homes, Wi-Fi cams and Wi-Fi wardriving. Lastly, we will enable ESP32 boards to execute interactions with mobile applications and cloud servers such as AWS. By the end of this book, you will be up and running with various IoT project-based ESP32 chip.

Who is this book for?

This book is for those who want to build a powerful and inexpensive IoT projects using the ESP32.Also for those who are new to IoT, or those who already have experience with other platforms such as Arduino, ESP8266, and Raspberry Pi.

What you will learn

  • Understand how to build a sensor monitoring logger
  • Create a weather station to sense temperature and humidity using ESP32
  • Build your own W-iFi wardriving with ESP32. Use BLE to make interactions between ESP32 and Android
  • Understand how to create connections to interact between ESP32 and mobile applications
  • Learn how to interact between ESP32 boards and cloud servers
  • Build an IoT Application-based ESP32 board
Estimated delivery fee Deliver to Luxembourg

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Mar 30, 2019
Length: 252 pages
Edition : 1st
Language : English
ISBN-13 : 9781789956870
Category :
Tools :

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Product feature icon AI Assistant (beta) to help accelerate your learning
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Estimated delivery fee Deliver to Luxembourg

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Publication date : Mar 30, 2019
Length: 252 pages
Edition : 1st
Language : English
ISBN-13 : 9781789956870
Category :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
€18.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
€189.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts
€264.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total 110.97
Hands-On Internet of Things with MQTT
€32.99
Internet of Things Projects with ESP32
€24.99
Developing IoT Projects with ESP32
€52.99
Total 110.97 Stars icon
Banner background image

Table of Contents

11 Chapters
Getting Started with ESP32 Chevron down icon Chevron up icon
Making Visual Data and Animation on an LCD Chevron down icon Chevron up icon
Building a Simple Game with an Embedded ESP32 Board Chevron down icon Chevron up icon
Building a Sensor Monitoring Logger Chevron down icon Chevron up icon
Controlling IoT Devices over the Internet Chevron down icon Chevron up icon
Building an IoT Weather Station Chevron down icon Chevron up icon
Making Your Own Wi-Fi Wardriving Chevron down icon Chevron up icon
Building Your Own Wi-Fi Cam Chevron down icon Chevron up icon
Making IoT Devices Interact with Mobile Applications Chevron down icon Chevron up icon
Building IoT Monitoring with Cloud Technology Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
(8 Ratings)
5 star 12.5%
4 star 0%
3 star 12.5%
2 star 25%
1 star 50%
Filter icon Filter
Top Reviews

Filter reviews by




Theresa Albright Jan 12, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I scanned through the book and was impressed how it walked through going from simple sensor reading to HTTP, CLOUD, and Android control of Smart Home automation.
Amazon Verified review Amazon
morandotti ferruccio Jun 11, 2019
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
Il libro di per sé è interessante, ma purtroppo i programmi di esempio riportati non fanno uso dell'IDE di Arduino ma usano un puro linguaggio C per cui richiedono un ambiente di sviluppo per il C.Come ambiente di sviluppo viene utilizzato un SDK che, a detta del libro, è della Espressif ma che non sono riuscito a trovare.
Amazon Verified review Amazon
GRR! Jul 27, 2019
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
Does not cover the basics in a logical fashion before moving on to bigger things. A handful of pages in and the author is attacking the topic of setting up an SD card. Whoa, billy!!
Amazon Verified review Amazon
Gunadi Kurniawan Oct 21, 2019
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
This book broke many cardinal rules of writing a training book:1. The writer assumes after giving the link to the Espressif website, then his work is done and the reader will understand all the contents. This is a tall order because the link is very large and has many sublinks.2. The writer assumes that all the online links are static, online links changes constantly.3. Need to contain more safety net, for example if . . . then do this. The book need more checklist/snapshots to make sure the reader are still following his guidance.I bought this book because it uses the official espressif hardware (ESP Wroover kit), but on every page I am left with so many unanswered questions that I ended up abandoning this book.
Amazon Verified review Amazon
Dave Waller Feb 23, 2020
Full star icon Empty star icon Empty star icon Empty star icon Empty star icon 1
I had great hopes for this book, at last a book that would show you how to use the ESP32 without relying on the Arduino software.Unfortunately the book has a huge number of issues, some of which are as follows:1. The book is out of date and recommends you download an older version of the software - the ESP32-IDF and tool chain. (I accept there is not much that can be done about this, but I did get the book when it was released and it was out of date straight away2. The graphics / pictures are out of step with the titles and cross references3. Some cross references are missing (eg the page says "See the following for further details" but does not actually have anything following4. The example code is very poorly written. The samples provided in the ESP32-IDF are far better and well commented.5. There is missing code from some of the examples so that they will never compile6. There is very little explanation of the code samples or what the functions called actually do.Overall this book seems to have been a hasty rewrite of the many other books on Arduino devices, ie light one LED, then light several LEDs but does not give you any real feel of what can be done, or what are the advantages of programming using FreeRTOS and ESP32-IDF.
Amazon Verified review Amazon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
What is custom duty/charge? Chevron down icon Chevron up icon

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order? Chevron down icon Chevron up icon

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges? Chevron down icon Chevron up icon

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
How can I cancel my order? Chevron down icon Chevron up icon

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact [email protected] with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at [email protected] using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on [email protected] with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on [email protected] within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on [email protected] who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on [email protected] within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela