Smart Home Automation System - Features

🏠 Room-Based Device Control

• A Java-based Smart Home Automation System that allows users to control IoT devices (lights, fans, ACs, security systems) via a console-based interface.

Living Room

• 💡 Smart Light (On/Off + Brightness 0-100%)
• ❄️ Air Conditioner (Temp Control + Cool/Heat/Fan modes)

Bedroom

• 💡 Smart Light (On/Off + Brightness 0-100%)
• 🌀 Ceiling Fan (On/Off + 3 Speed Levels)
• ❄️ Air Conditioner (Temp Control + Cool/Heat/Fan modes)

Kitchen

• 💡 Smart Light (On/Off + Brightness 0-100%)
• 🍳 Exhaust Fan (On/Off + 3 Speed Levels)

Whole Home Security

• 🚨 Alarm System (Arm/Disarm)
• 👀 Motion Detection
• 🤖 Automated Lighting Responses

👥 User Management

Authentication

• 🔒 SHA-256 Password Hashing
• 📁 Secure Credential Storage
• Default Accounts:
  • Admin: admin/admin123
  • User: user/user123

User Types

Role	Capabilities	Special Access
Admin	All device controls	👥 User Management ⚡ Energy Monitoring
Regular User	All device controls	You Ain't him Brdr

User Operations

• ➕ Add new users
• ➖ Remove users
• 📜 List all users
• 🔄 Change passwords
• ⚡ Toggle admin privileges

🤖 Automation Features

Motion Detection

• Automatically triggers:
  • Living room lights 💡 (100% brightness)
  • Kitchen lights 💡 (100% brightness)
  • Alarm activation 🚨 (if armed)

Energy Monitoring (Admin Only)

• 🔌 Real-time power tracking
• 📊 Per-device consumption
• ∑ Total home usage

🖥️ System Interface

Menu Navigation

flowchart TD
    A[Main Menu] --> B[Living Room]
    A --> C[Bedroom]
    A --> D[Kitchen]
    A --> E[Security]
    A --> F[User Management]
    
    B --> B1[Light]
    B --> B2[AC]
    C --> C1[Light]
    C --> C2[Fan]
    C --> C3[AC]
    D --> D1[Light]
    D --> D2[Exhaust Fan]
    E --> E1[Arm]
    E --> E2[Alarm]
    E --> E3[Motion]
    F --> F1[Add User]
    F --> F2[Remove]
    F --> F3[List]

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Execution Flow

• Application starts (Main.java)

• The authentication screen appears

• User logs in with credentials

• Appropriate menu shown based on role

• User interacts with devices

• System persists changes where needed

• User logs out or exits

Technical Highlights

OOP Principles:

• Inheritance (Device → Light/Fan/AC)

• Polymorphism (User → Admin/RegularUser)

• Encapsulation (private fields with public methods)

• Abstraction (abstract classes)

Security Features:

• Password hashing

• Role-based access control

• Secure credential storage

Automation:

• Event-driven responses

• Configurable triggers

• Multi-device coordination

Code snippets

• Authentication & Security
• Password Hashing (SHA-256)

// Hashing logic in Authentication.java
MessageDigest md = MessageDigest.getInstance("SHA-256");
byte[] hashedBytes = md.digest(password.getBytes());

• Secure Password Input

// Masks input with '*' in IDEs, hides completely in terminals
if (System.console() != null) {
    return new String(System.console().readPassword());
}

• Device Control Logic
• Light Class Example

public class Light extends Device {
    private int brightness; // 0-100%

    public void setBrightness(int level) {
        if (level >= 0 && level <= 100) {
            this.brightness = level;
            System.out.println(name + " brightness set to " + level + "%");
        }
    }
}

• Automation & Event Handling

• Motion Detection Workflow

// In SecuritySystem.java
public void detectMotion() {
    if (isOn) {
        livingRoomLight.turnOn();
        livingRoomLight.setBrightness(100);
    }
}