ESP32 Smart Home Automation

A Wi-Fi based Home Automation System built using the ESP32 microcontroller. This project allows users to control multiple devices through a web interface and physical push buttons. The system supports real-time status updates and can be expanded using relay modules for controlling household appliances.

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Features

• Web-based control panel
• Physical push button control
• Real-time device status updates
• Wi-Fi connectivity
• Reset all outputs functionality
• Mobile-friendly interface
• mDNS support (esp32.local)
• Compatible with LEDs and relay modules

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Hardware Requirements

Component	Quantity
ESP32 DevKit V1	1
Push Buttons	4
LEDs	4
220Ω Resistors	4
Breadboard	1
Jumper Wires	As Required

Optional Components

Component	Quantity
4-Channel Relay Module	1

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Pin Configuration

Output Pins

Output	GPIO
Output 1	GPIO 16
Output 2	GPIO 17
Output 3	GPIO 18
Output 4	GPIO 19

Input Pins

Button	GPIO
Button 1	GPIO 12
Button 2	GPIO 14
Button 3	GPIO 26
Button 4	GPIO 27

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Circuit Description

The ESP32 hosts a web server that allows users to control four outputs from any device connected to the same Wi-Fi network. Each output can be controlled through both the web interface and a dedicated physical push button.

• GPIO 16, 17, 18 and 19 are configured as outputs.
• GPIO 12, 14, 26 and 27 are configured as button inputs using INPUT_PULLUP.
• LEDs can be replaced with relay modules for controlling household appliances.
• All grounds must be connected together.

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Software Requirements

• Arduino IDE
• ESP32 Board Package
• AsyncTCP
• ESPAsyncWebServer
• ESPmDNS

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Installation

Clone Repository

git clone https://github.com/heychandu/Esp-32-based-home-automation.git

Configure Wi-Fi

Update the following lines in the source code:

const char* ssid = "YOUR_WIFI_NAME";
const char* password = "YOUR_WIFI_PASSWORD";

Upload Code

1. Connect ESP32 to your computer.
2. Open the project in Arduino IDE.
3. Select ESP32 Dev Module.
4. Install the required libraries.
5. Compile and upload the code.
6. Open Serial Monitor at 115200 baud.

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Accessing the Web Interface

After uploading the code and connecting to Wi-Fi, open a browser on the same network and visit:

http://esp32.local

or

http://<ESP32-IP-ADDRESS>

The web interface allows you to:

• Toggle individual outputs
• Monitor device states in real time
• Reset all outputs with a single click

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Project Structure

Esp-32-based-home-automation/
│
├── src/
│   └── main.ino
│
├── images/
│   └── circuit-diagram.png
│
└── README.md

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Future Enhancements

• MQTT Integration
• Home Assistant Integration
• Mobile Application
• Authentication System
• Device Scheduling
• Energy Monitoring
• Voice Assistant Support

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Author Details

Chandu R

GitHub: https://github.com/heychandu