SecureComm Mobile (Archived)

This directory contains the archived React Native mobile application for SecureComm. It has been preserved as a reference implementation for future development.

Archive Date

March 2026

Why Archived

The project consolidated on a web-first approach using SecureGram (React/Vite). The mobile app development was paused to focus resources on the web application, which provides broader compatibility and easier deployment.

Key Modules (Reference Value)

1. Bluetooth LE Mesh Implementation

Files:

• android/app/src/main/java/com/securecomm/BluetoothMeshModule.java
• ios/SecureComm/BluetoothMeshModule.swift

Features:

• Real Bluetooth LE advertising and scanning
• GATT server/client for connections
• Service UUID: 6E400001-B5A3-F393-E0A9-E50E24DCCA9E
• Characteristic UUIDs:
  • TX: 6E400002-B5A3-F393-E0A9-E50E24DCCA9E (write)
  • RX: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E (notify)
  • Public Key: 6E400004-B5A3-F393-E0A9-E50E24DCCA9E (read)
• Device discovery with RSSI signal strength
• Public key exchange via characteristic

2. Audio Recording/Playback

Files:

• android/app/src/main/java/com/securecomm/AudioModule.java
• ios/SecureComm/AudioModule.swift

Features:

• Real-time audio recording at 44.1kHz
• Base64 audio streaming for JS bridge
• Voice level detection (RMS calculation)
• Low-latency audio playback

3. Crypto Module

Files:

• android/app/src/main/java/com/securecomm/CryptoModule.java
• ios/SecureComm/CryptoModule.swift

Features:

• Native cryptographic operations
• Key generation and management

Using This Reference

For Web Bluetooth Implementation

The Bluetooth module patterns can inform a future WebBluetoothMeshProvider:

1. Service/Characteristic UUIDs - Use the same UUIDs for compatibility
2. Connection Flow - The GATT connection pattern maps to Web Bluetooth API
3. Event-based Architecture - The event emitter pattern works well with browser events
4. Message Encoding - Base64 encoding for binary data transfer

For Audio Implementation

The audio module patterns are already implemented in SecureGram using Web Audio API, but the native patterns may inform:

• Audio buffer management
• Voice activity detection algorithms
• Streaming audio chunk handling

Directory Structure

securecomm-mobile/
├── android/                    # Android native modules
│   └── app/src/main/java/com/securecomm/
│       ├── BluetoothMeshModule.java
│       ├── AudioModule.java
│       └── CryptoModule.java
├── ios/SecureComm/             # iOS native modules
│   ├── BluetoothMeshModule.swift
│   ├── AudioModule.swift
│   └── CryptoModule.swift
├── src/                        # React Native source code
└── package.json                # Dependencies reference

Dependencies of Note

See package.json for the full dependency list. Key dependencies:

• react-native - React Native framework
• react-native-ble-plx - Bluetooth LE library (alternative approach)
• Native modules for crypto and audio

Future Development

If mobile development resumes, consider:

1. React Native New Architecture - Use Fabric and TurboModules
2. Expo - Consider Expo for easier development
3. Web Bluetooth API - May enable code sharing with web app
4. Unified Mesh Provider - Create shared abstraction for web/mobile

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For current development, see the SecureGram web application.