Smart Home Automation System

An IoT-based Smart Home Automation System developed using ESP32-S3, Firebase Realtime Database, and an Android Mobile Application. The system enables users to remotely monitor environmental conditions and control household devices in real time through a mobile application.

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Project Overview

This project implements a smart home automation solution that allows users to control electrical devices and monitor environmental conditions remotely via a mobile application.

The system uses an ESP32-S3 microcontroller as the central controller, which communicates with Firebase Realtime Database over Wi-Fi. Sensor data is continuously uploaded to Firebase, while device control commands from the mobile application are retrieved and executed by the ESP32.

The system currently supports:

• Remote control of 3 fans
• Remote control of 1 light
• Temperature monitoring
• Humidity monitoring
• Motion detection
• Real-time synchronization through Firebase

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Features

Device Control

• Control Fan 1 (Living Room Fan)
• Control Fan 2 (Bedroom Fan)
• Control Fan 3 (Kitchen Fan)
• Control Main Light
• Quick Actions (All ON / All OFF)

Sensor Monitoring

• Real-time Temperature Monitoring
• Real-time Humidity Monitoring
• Motion Detection Monitoring

Cloud Connectivity

• Firebase Realtime Database Integration
• Real-time Data Synchronization
• Wi-Fi Connectivity

User Interface

• Android Mobile Application
• Modern Dashboard UI
• Device Status Visualization
• Sensor Status Cards

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Hardware Components

Component	Quantity
ESP32-S3 Development Board	1
DHT22 Temperature & Humidity Sensor	1
PIR Motion Sensor	1
4-Channel Relay Module	1
5V DC Fan	3
LED Light	1
Li-ion 18650 Battery	1
Mini Breadboard	1
Jumper Wires	Multiple

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Software Technologies

Firmware Development

• Arduino IDE
• ESP32 Arduino Framework

Mobile Application

• Android Studio
• Kotlin

Cloud Platform

• Firebase Realtime Database

Libraries Used

• FirebaseESP32
• WiFi
• DHT Sensor Library
• Adafruit SSD1306
• Adafruit GFX

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System Architecture

The system follows a cloud-based IoT architecture.

Mobile App
      │
      ▼
Firebase Realtime Database
      │
      ▼
ESP32-S3
├── DHT22 Sensor
├── PIR Motion Sensor
└── Relay Module
     ├── Fan 1
     ├── Fan 2
     ├── Fan 3
     └── Light

Architecture Diagram:

Circuit Design

The ESP32-S3 serves as the central controller, interfacing with sensors, actuators, and the Firebase cloud.

Circuit Diagram:

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Firebase Structure

The project uses Firebase Realtime Database for storing device states and sensor data.

{
  "devices": {
    "fan1": {
      "name": "Living Room Fan",
      "status": "off",
      "timestamp": 1764582623467,
      "type": "fan"
    },
    "fan2": {
      "name": "Bedroom Fan",
      "status": "off",
      "timestamp": 1764582623478,
      "type": "fan"
    },
    "fan3": {
      "name": "Kitchen Fan",
      "status": "on",
      "timestamp": 1781107479876,
      "type": "fan"
    },
    "light1": {
      "name": "Main Light",
      "status": "off",
      "timestamp": 1764582623471,
      "type": "light"
    }
  },

  "sensors": {
    "humidity": 84.1,
    "motion": true,
    "temperature": 27.2,
    "timestamp": 1761287759650
  }
}

Firebase Screenshot:

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Mobile Application

The Android application provides a user-friendly interface for monitoring sensors and controlling devices.

Dashboard Features

• Temperature Display
• Humidity Display
• Motion Detection Status
• Fan Control Panel
• Light Control Panel
• Quick Actions

Application Screenshots:

Docs/Screenshots/
├── Dashboard.png
└── Device_Controls.png

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Installation Guide

1. Clone Repository

git clone https://github.com/AbuBaker-AB/IoT-Home-Automation

2. Firebase Setup

Create a Firebase project and enable:

• Realtime Database

Update the following values inside the ESP32 firmware:

#define WIFI_SSID ""
#define WIFI_PASSWORD ""

#define API_KEY ""
#define DATABASE_URL ""

#define USER_EMAIL ""
#define USER_PASSWORD ""

3. Upload ESP32 Firmware

Open:

Firmware/SmartHomeAutomation_ESP32S3.ino

Compile and upload the code using Arduino IDE.

4. Build an Android Application

Open:

Mobile App/

in Android Studio and run the application on an Android device.

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Repository Structure

Home-Automation-System/
│
├── Firmware/
│   └── SmartHomeAutomation_ESP32S3.ino
│
├── Mobile App/
│
├── Firebase/
│   └── database_structure.json
│
├── Docs/
│   ├── Architecture-Diagram/
│   ├── Circuit-Design/
│   ├── Components/
│   └── Screenshots/
│
├── README.md
└── LICENSE

Authors

Abu Baker

Department of Computer Science and Engineering East Delta University Chattogram, Bangladesh

Project Type

IoT-Based Smart Home Automation System

Technologies

ESP32-S3 • Firebase • Android Studio • Kotlin • Arduino IDE • IoT

License

This project is licensed under the MIT License - see the LICENSE file for details.