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Build a Smart Home with ESP32 & Google Home | 2026

Name: Build a Smart Home with ESP32 & Google Home | 2026
Rating: 4.2 (19 reviews)

Master ESP32 programming, IoT communication, relay control, and smart home automation from scratch

Created byStepwise Learning ., Technical Support Team

Last updated 6/2026

English

What you'll learn

Understand the complete architecture of an IoT-based Home Automation System and how all components work together.
Set up and configure the ESP32 development environment using Arduino IDE from scratch.
Explore the ESP32 board in detail, including GPIO pins, capabilities, and practical usage.
Test and validate individual hardware modules before integrating them into the final project.
Interface and control relay modules to switch real-world electrical appliances safely and efficiently.
Learn multiple techniques to solve the common relay inversion problem encountered in automation projects.
Integrate physical wall switches with the ESP32 to enable both manual and smart control of devices.
Understand MQTT communication and how devices exchange data in real-time through cloud services.
Connect your ESP32 project to the internet and control appliances remotely from anywhere in the world.
Build a complete smartphone-controlled home automation system with real-time device monitoring.
Integrate Google Home and control lights, fans, and appliances using voice commands.
Learn how cloud-based IoT systems process commands and synchronize device states.
Develop practical C++ programming skills while working with real hardware and embedded systems.
Troubleshoot common hardware, software, networking, and connectivity issues during project development.
Test, deploy, and validate the complete smart home automation system in a real-world environment.
Gain the confidence to design, customize, and expand your own IoT and Embedded Systems projects.
Complete a portfolio-ready Home Automation Project that demonstrates practical IoT development skills.

Coding Exercises

This course includes our updated coding exercises so you can practice your skills as you learn.

Course content

10 sections • 59 lectures • 3h 5m total length

Introduction to Home Automation4:32
In this lecture, you will understand the concepts and benefits of automating our home.
Getting Started with ESP322:51
This lecture introduces you to the fundamentals of ESP32 development and its important features.
Mastering GPIO Pins6:14
In this lecture, you will gain an understanding of the GPIO pins on the ESP32 development board and their versatile functionalities, including analog and digital input/output, PWM control, and touch-sensing capabilities.

Hardware Requirements for the Complete Project7:13
In this lecture, you will get to know the list of complete hardware requirements for the project development.
Document - Hardware Requirements List3:21
This document contains complete hardware list using which you can place order online.
Connecting and Verifying the USB to UART Chip in ESP323:12
This lecture provides an overview of setting up the ESP32 microcontroller board, connecting it to a computer using a micro USB cable, identifying the USB to UART chip, and checking the device manager for driver installation, ensuring a smooth setup process for programming and communication.
Arduino Installation3:34
This lecture guides you through the process of downloading and installing the Arduino IDE, checking if it includes the CP2102 driver, and adjusting the font size within the IDE for better visibility.
Setting Up ESP32 in Arduino IDE6:23
In this lecture, you will learn how to install the ESP32 board library in the Arduino IDE, manually install the CP2102 driver for the ESP32 board, and ensure successful communication between the computer and the ESP32 board.
Testing the ESP32 Board (PART 1)4:13
In this lecture, you will do basic programming to control the onboard LED of ESP32. This test will help you to check whether the board is functioning or not.
Testing the ESP32 Board (PART 2)5:37
In this lecture, you will do basic programming to control the onboard LED of ESP32. This test will help you to check whether the board is functioning or not.
CODE - Testing the ESP32 Board0:09
In this lecture, you can download the code used in the program to test the ESP32 board.

Introduction to Relay3:25
In this lecture, you will get a basic understanding of the components and workings of relays.
Understanding the Circuit Diagram to Test One Input of 4 Channel Relay2:56
In this lecture, you will understand the circuit diagram to test the relay.
Circuit diagram - Testing One Input of 4 Channel Relay
In this lecture, you can view the circuit diagram to test the relay.
Understanding the Code to Test One Input of 4 Channel Relay3:24
In this lecture, you will understand the program line by line for testing the relay.
CODE - Testing One Input of 4 Channel Relay0:11
In this lecture, you can download the source code for testing the relay.
OUTPUT - Testing One Input of 4 Channel Relay4:10
In this lecture, you will view the live testing of the relay.

Resolving the Inverted Operation of the Relay3:02
In this lecture, you will get the different approaches for resolving the problem of the inverted operation of the relay.
CODE - Resolving the Inverted Operation of the Relay using the code modification0:11
In this lecture, you can download the code which was used in the previous lecture to fix the inverted working of the relay.
Circuit Diagram - Resolving the Inverted Operation of the Relay using NC
In this lecture, you can view the updated circuit diagram using which you can fix the issue of the inverted relay.

Understanding the Circuit Diagram to Control a Bulb with a Physical Switch1:57
In this lecture, you will understand the circuit diagram for controlling a bulb using a physical switch.
Circuit diagram - Controlling a Bulb with a Physical Switch
In this lecture, you can view the circuit diagram for controlling a bulb using a physical switch.
Understanding the Code to Control a Bulb with a Physical Switch5:38
In this lecture, you will understand the program for controlling a bulb using a physical switch.
CODE - Controlling a Bulb with a Physical Switch0:24
In this lecture, you can download the source code for controlling a bulb using a physical switch.
Output - Controlling a Bulb with a Physical Switch1:34
In this lecture, you can view the live output of controlling a bulb using a physical switch.
Understanding the Circuit Diagram to Control 4 Bulbs with 4 Physical Switches5:46
In this lecture, you will understand the circuit diagram for controlling 4 bulbs using 4 physical switches.
Circuit diagram to Control 4 Bulbs with 4 Physical Switches
In this lecture, you can view the circuit diagram for controlling 4 bulbs using 4 physical switches.
Understanding the Code to Control 4 Bulbs with 4 Physical Switches (PART 1)4:36
In this lecture, you will understand the program for controlling 4 bulbs using 4 physical switches.
Understanding the Code to Control 4 Bulbs with 4 Physical Switches (PART 2)4:40
In this lecture, you will understand the program for controlling 4 bulbs using 4 physical switches.
CODE - Controlling 4 Bulbs with 4 Physical Switches0:57
In this lecture, you can download the source code for controlling 4 bulbs using 4 physical switches.
C++ Fundamentals

An Introduction to Internet of Things4:20
In this lecture, you will get an understanding of IoT and its application. And also you will get to know why IoT application is important for developing the main project.
Exploring ESP Rainmaker3:02
In this lecture, we will introduce the mobile application to use our main project effectively and at our convenience.
Understanding MQTT Protocol3:04
In this lecture, you will understand in detail about MQTT protocol and its working principle.

Understanding the Circuit Diagram for Controlling 4 Home Appliances1:34
In this lecture, you will understand the circuit diagram to control 4 home appliances using ESP Rainmaker.
Circuit Diagram - Controlling 4 Home Appliances with ESP Rainmaker
In this lecture, you can view the circuit diagram to control 4 home appliances using ESP Rainmaker.
Powering the Whole Circuit using One Power Supply1:56
In this lecture, you will understand the alternative method to power the whole circuit.
Circuit Diagram - Powering the Whole Circuit using One Power Supply
In this lecture, you can view the circuit diagram of the alternative method of power supply.
Understanding the Code to Control 4 Home Appliances with ESP Rainmaker (PART 1)9:24
In this lecture, we will dive deep into the source code of our main project, examining each line to gain a comprehensive understanding of its functionality and implementation.
Understanding the Code to Control 4 Home Appliances with ESP Rainmaker (PART 2)8:58
In this lecture, we will dive deep into the source code of our main project, examining each line to gain a comprehensive understanding of its functionality and implementation.
Understanding the Code to Control 4 Home Appliances with ESP Rainmaker (PART 3)5:54
In this lecture, we will dive deep into the source code of our main project, examining each line to gain a comprehensive understanding of its functionality and implementation.
Understanding the Code to Control 4 Home Appliances with ESP Rainmaker (PART 4)13:40
In this lecture, we will dive deep into the source code of our main project, examining each line to gain a comprehensive understanding of its functionality and implementation.
Understanding the Code to Control 4 Home Appliances with ESP Rainmaker (PART 5)3:02
In this lecture, we will dive deep into the source code of our main project, examining each line to gain a comprehensive understanding of its functionality and implementation.
Understanding the Code to Control 4 Home Appliances with ESP Rainmaker (PART 6)5:22
In this lecture, we will dive deep into the source code of our main project, examining each line to gain a comprehensive understanding of its functionality and implementation.
CODE - Controlling 4 Home Appliances with ESP Rainmaker2:54
In this lecture, you can download the source code of the main project.

Flashing ESP326:42
In this lecture, you will know how to flash the ESP32 before code deployment for getting improper output in the serial monitor.
Uploading Final Code to ESP322:56
In this lecture, we will upload our main project into ESP32 board.
ESP RainMaker Setup and Device Provisioning4:00
In this lecture, you will learn to setup the ESP Rainmaker app and the device provisioning steps to use the app as per your interest.
Setting Up and Configuring Google Home4:38
In this lecture, you will learn to setup the Google Home app and sync it with the ESP Rainmaker app.
Testing the Live OUTPUT of the Project using Mobile App3:27
In this lecture, we will test the live output of the main project using our mobile applications. We will see the output using touch-based, voice-based, and via physical switches.
Testing the Live OUTPUT of the Project using External Adapter Only2:06
In this lecture, we will remove the dual dependency of the power supply and use only an external adapter to power the circuit of our main project.
Testing the Live OUTPUT of the Project Without WIFI2:05
In this lecture, you will get to know how to control home appliances in such scenarios when the WiFi is disconnected or not working properly.
Fundamentals of ESP32, Relay and IoT
Project Summary4:02
In this lecture, you will get an overview of what you have learned in this course.

Write a program to print all the even numbers between 1 and 20.
Write a program to calculate the sum and average of elements in an array.
Write a program to concatenate two strings.
Write a program to calculate permutations and combinations for given values of n and r.
Write a program to calculate the sum of the series 1 + 1/2 + 1/3 + 1/4 + ...
Implement C++ class to manage student information like name, roll, gender, class and grades.
Relay Program
C++ Program
Temperature Reading

Troubleshooting ESP32 Detection and COM Port Issues0:27
Learn how to resolve common problems that prevent the ESP32 from being detected by the computer or Arduino IDE.
Troubleshooting ESP32 Code Upload Errors0:26
Learn how to resolve the most common ESP32 programming and upload failures.
Troubleshooting Relay Module Issues0:22
Learn how to identify and resolve common relay wiring and switching problems.
Troubleshooting Physical Switch Detection Problems0:19
Learn how to fix issues where physical wall switches fail to control appliances.
Troubleshooting Wi-Fi and ESP RainMaker Connectivity0:20
Learn how to resolve network connectivity and cloud communication issues.
Troubleshooting Google Home Integration Issues0:22
Learn how to fix common Google Home and voice assistant integration problems.
Troubleshooting the Complete Home Automation Project0:24
Learn a systematic approach to diagnosing and fixing issues in the final integrated project.

Requirements

No prior experience with IoT, ESP32, MQTT, or Home Automation is required.
Basic computer skills and the ability to install software on your computer.
An ESP32 development board and relay module (recommended for hands-on practice).
Basic understanding of programming concepts is helpful but not mandatory.
A willingness to learn and build real-world IoT and Embedded Systems projects.

Description

BUILD A COMPLETE IoT HOME AUTOMATION SYSTEM WITH ESP32, MQTT & GOOGLE HOME

Imagine controlling your home's lights, fans, and appliances from anywhere in the world using your smartphone—or simply by speaking a voice command.

In this hands-on course, you'll build a complete Home Automation System from scratch using the powerful ESP32 microcontroller, IoT technologies, cloud connectivity, and voice assistant integration.

This is not a theory-heavy course filled with slides and complex explanations. Instead, you'll learn by building a real-world project that combines hardware, software, networking, and automation into one complete solution.

The Internet of Things (IoT) is transforming homes, offices, factories, and cities. Organizations across the world are investing heavily in smart devices and connected systems, creating exciting opportunities for developers, engineers, and technology enthusiasts. By understanding how these systems are built, you'll gain practical skills that can be applied to countless automation and embedded system projects.

One of the biggest challenges beginners face is connecting programming knowledge with real hardware. This course bridges that gap by showing you how software interacts with physical devices, sensors, relays, cloud platforms, and mobile applications.

Throughout the project, you'll gain valuable experience working with ESP32, one of the most widely used microcontrollers in modern IoT development. You'll also strengthen your C++ programming skills while learning how real-world automation systems communicate, process commands, and control electrical devices.

This course is ideal for students, hobbyists, aspiring IoT developers, embedded system enthusiasts, and anyone who wants practical experience building smart devices instead of simply learning theory.

By completing this project, you'll have a fully functional smart home automation system that you can customize, expand, and showcase as part of your technical portfolio. More importantly, you'll gain the confidence to build your own IoT and embedded projects in the future.

Complete source code is included, allowing you to follow along easily and experiment with your own modifications.

If you ever need assistance, simply post your question in the Q&A section. Our support team responds within 24 hours (Monday to Saturday) to help keep your learning journey on track.

All lectures include English subtitles for a better learning experience.

The best way to learn IoT and Embedded Systems is by building real projects—and that's exactly what you'll do in this course.

Enroll today and start your journey into the exciting world of Smart Home Automation, IoT Development, ESP32 Programming, and Embedded Systems.

Who this course is for:

Beginners who want to learn IoT and Embedded Systems through a real-world Home Automation project.
Students interested in ESP32, Smart Home Automation, MQTT, and Internet of Things (IoT) technologies.
Electronics and hardware enthusiasts who want hands-on experience working with relays, switches, and microcontrollers.
C++ programmers looking to apply their coding skills to real hardware and automation projects.
Engineering students seeking practical project experience in Embedded Systems and IoT development.
Anyone who wants to build and control home appliances using mobile apps and Google Home voice commands.

Build a Smart Home with ESP32 & Google Home | 2026

What you'll learn

Explore related topics

Coding Exercises

Course content

Introduction3 lectures • 14min

Setup and Configuration8 lectures • 34min

Relay Testing6 lectures • 14min

Fixing the Relay3 lectures • 3min

Reading the input of Mechanical Switch10 lectures • 26min

Getting to know about ESP Rainmaker and IOT Protocols3 lectures • 10min

Understanding the Circuit Diagram and Code of the Main Project11 lectures • 53min

Setting Up the Environment for the Execution of the Main Project8 lectures • 30min

Quizzes, Coding Exercise and Assignment0

Troubleshooting and Common Issues7 lectures • 3min

Requirements

Description

Who this course is for: