🌟 NavDrishti - Smart Navigation for the Visually Impaired

NavDrishti is an innovative IoT-based smart navigation system designed to assist visually impaired individuals with safe and independent mobility. The project combines a mobile application with a smart blind stick equipped with sensors to provide real-time obstacle detection, GPS navigation, and emergency support.

📋 Table of Contents

• Features
• Architecture
• Getting Started
• Project Structure
• Hardware

✨ Features

For Visually Impaired Users

• 🔗 Smart Stick Integration - Bluetooth connectivity with ESP32-based smart stick
• 🚨 Real-time Obstacle Detection - Voice alerts for obstacles, potholes, and vehicles
• 🗺️ GPS Navigation - Navigate to destinations using OpenStreetMap
• 📷 Surroundings Description - AI-powered camera to identify and describe objects
• 🆘 Emergency SOS - One-tap emergency alerts to guardians with location
• 🎙️ Voice Interface - Complete voice control and feedback
• 📍 Journey Tracking - Automatic journey logging and history

For Guardians

• 📍 Live Location Tracking - Real-time monitoring of loved ones
• 🔔 Instant Alerts - Push notifications for emergencies and safety events
• 📊 Journey History - View past trips and travel patterns
• 🔋 Device Monitoring - Check smart stick battery and connection status
• 👥 Multi-User Support - Monitor multiple visually impaired users

🏗️ Architecture

┌─────────────────┐
│  Mobile App     │
│   (Flutter)     │
└────────┬────────┘
         │
    ┌────┴────┐
    │         │
┌───▼──┐  ┌──▼────┐
│ BLE  │  │Backend│
│Device│  │Services│
└──────┘  └───┬───┘
              │
      ┌───────┴───────┐
      │               │
  ┌───▼────┐    ┌────▼─────┐
  │Supabase│    │ Firebase │
  │Database│    │   FCM    │
  └────────┘    └──────────┘

🚀 Getting Started

Prerequisites

• Flutter SDK 3.9.2 or higher
• Dart SDK 3.9.2 or higher
• Android Studio / Xcode
• Physical device (for BLE and camera testing)
• Supabase account
• Firebase account

Quick Setup

1. Clone the repository

   git clone https://github.com/yourusername/navdrishti.git
   cd navdrishti

2. Install dependencies

   flutter pub get

3. Configure Supabase

   • Create a Supabase project
   • Run SQL from lru/supabase_setup.sql
   • Update lib/core/config/supabase_config.dart

4. Configure Firebase

   • Follow guide in lru/FIREBASE_SETUP.txt
   • Add google-services.json and GoogleService-Info.plist
   • Update lib/core/config/firebase_options.dart

5. Run the app

   flutter run

📖 Detailed setup instructions: See lru/QUICKSTART_GUIDE.txt

📁 Project Structure

lib/
├── core/
│   ├── config/          # App configuration
│   ├── models/          # Data models
│   ├── services/        # Business logic services
│   ├── theme/           # App theming
│   └── router/          # Navigation
└── features/
    ├── auth/            # Authentication
    ├── home/            # Home screens
    ├── device/          # BLE device connection
    ├── navigation/      # GPS navigation
    ├── camera/          # Image recognition
    ├── alerts/          # Alert system
    ├── profile/         # User profile
    └── settings/        # App settings

lru/                     # Documentation & Setup Files
├── supabase_setup.sql           # Database schema
├── FIREBASE_SETUP.txt           # Firebase guide
├── PROJECT_README.txt           # Complete documentation
├── QUICKSTART_GUIDE.txt         # Quick setup
├── HARDWARE_SETUP.txt           # Hardware assembly
├── esp32_firmware.ino           # ESP32 code
└── PROJECT_SUMMARY.txt          # Project overview

🔧 Hardware

Smart Stick Components

• ESP32 DevKit
• HC-SR04 Ultrasonic Sensors (2x)
• IR Sensors (2x)
• Vibration Motor
• Li-ion Battery with charging circuit

Total Cost: ~₹1,400 per unit

🛠️ Technologies

Mobile App

• Flutter - Cross-platform framework
• Riverpod - State management
• Go Router - Navigation
• Supabase - Backend & database
• Firebase - Push notifications
• BLE - Device communication
• Google ML Kit - Image recognition

Backend

• Supabase - PostgreSQL + Realtime
• Firebase Cloud Messaging - Push notifications
• PostGIS - Geospatial data

Hardware

• ESP32 - Microcontroller
• Arduino - Firmware development
• BLE - Wireless communication

🧪 Testing

# Run all tests
flutter test

# Run with coverage
flutter test --coverage

# Run on device
flutter run

🏗️ Build

Android

flutter build apk --release
flutter build appbundle --release

iOS

flutter build ios --release
flutter build ipa --release

💡 Key Highlights

• ✅ Affordable - Well under ₹3,000 per unit target
• ✅ Comprehensive - Complete solution with hardware and software
• ✅ Accessible - Voice-first interface design
• ✅ Real-time - Live obstacle detection and location tracking
• ✅ Scalable - Built on modern, scalable technologies

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Made with ❤️ for the visually impaired community by team lrucache13