LifeLine

Healthline is a full-stack telemedicine application designed to bridge the gap in rural healthcare. It features role-based access for doctors and patients, an AI-powered symptom checker, digital health records via QR codes, and integrated video consultations.

Built with React Native (Expo) and Node.js.

Features

• ** Role-Based Authentication:**
  • Secure Login/Signup for Doctors and Patients.
  • Doctors can access all patient records; Patients can only access their own history.
• ** AI Symptom Checker:**
  • Integrated with Google Gemini 2.5 Flash.
  • Smart chat interface for preliminary symptom triage.
• ** Digital Health Records:**
  • Generates instant QR Codes for patient data for easy sharing.
• ** Video Telemedicine:**
  • Integrated video calling using VideoSDK (Requires Development Build).
• ** Secure Backend:**
  • SQLite database with encrypted passwords (bcrypt).
  • REST API with role-based data filtering.

Tech Stack

• Frontend: React Native, Expo Router, TypeScript
• Backend: Node.js, Express.js, SQLite
• AI: Google Gemini API (@google/generative-ai)
• Video: VideoSDK (@videosdk.live/react-native-sdk)

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Getting Started

Follow these instructions to set up the project locally.

1. Backend Setup

The backend manages the database, authentication, and AI connection.

1. Navigate to the backend folder:

   cd backend

2. Install dependencies:

   npm install

3. Configure Environment Variables: Create a file named .env in the backend folder and add your Gemini API Key:

   GEMINI_API_KEY=Your_Google_Gemini_Key_Here

4. Start the Server:

   node server.js

   You should see: 🚀 Server running on http://localhost:5000

2. Frontend Setup

The frontend is the mobile application.

1. Navigate to the project root (where app folder is):

   cd ..
   # or cd frontend/frontend depending on your structure

2. Install dependencies:

   npm install

3. Configure IP Address: You must update the API_URL in the following files to match your computer's Local IP Address (find it using ipconfig or ifconfig):

   • app/(auth)/login.tsx
   • app/(auth)/register.tsx
   • app/(app)/dashboard.tsx
   • app/(app)/ai_chat.tsx

   Example:

   const API_URL = "[http://192.168.1.5:5000](http://192.168.1.5:5000)"; // Use your actual IP, not localhost!

4. Start the App:

   npx expo start -c

5. Scan the QR code with the Expo Go app on your phone (Android/iOS).

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Important Troubleshooting

If you see "Network Request Failed" or "Unreachable" on your phone:

1. Check Wi-Fi: Ensure your phone and computer are on the exact same Wi-Fi network.
2. Windows Firewall:
   • You may need to create an Inbound Rule in Windows Firewall to allow traffic on Port 5000.
   • Alternatively, ensure your Network Profile is set to Private, not Public.
3. Server Address:
   • The server must listen on 0.0.0.0, NOT localhost.
   • Note: The provided server.js is already configured correctly for this.

Note on Video Calling

The Video Calling feature uses native WebRTC modules. It will not work in the standard Expo Go client.

To test video calling, you must create a Development Build:

npx expo run:android
# OR
eas build --profile development --platform android