Offline peer-to-peer transfer for files, chat, speed tests, and audio over Wi-Fi Direct.
No internet. No router. No hotspot. Just a direct device-to-device connection.
Windows:
WiFi Direct Cable creates a private local link between nearby devices using Wi-Fi Direct. Once connected, the devices share one negotiated app session for chat, file transfer, speed testing, and audio.
This repository contains the Flutter Android client. A separate Windows companion app is available here: WDCableWUI.
- Direct device-to-device connection without internet access.
- High-speed file transfer for local sharing.
- Real-time chat between connected peers.
- Low-latency Audio Link using RTP/RTCP over UDP with libopus.
- Selectable audio quality and latency modes.
- Built-in upload and download speed tests.
- Protocol v2 transport with UDP rendezvous and detailed connection diagnostics.
- Android client with a separate Windows companion app.
Use an Android device as a mobile microphone sender and the Windows client as the receiver. Audio Link streams libopus audio over RTP/RTCP and provides selectable quality and latency modes for different network conditions.
| Android Audio Link | Windows Audio Link |
|---|---|
 |
 |
| Connection | Chat | Speed Test | File Transfer |
|---|---|---|---|
 |
 |
 |
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Version 2.0.1 is the Protocol v2 release. It separates Wi-Fi Direct group-owner/client roles from WDCable TCP listener/connector roles, uses UDP rendezvous when needed, and upgrades Audio Link to RTP/RTCP over UDP with libopus.
- More reliable Wi-Fi Direct session setup, including a fix for Windows endpoint routing issues.
- Wi-Fi Direct clients now own the WDCable TCP listeners.
- UDP rendezvous lets Android group-owner devices safely discover the peer listener endpoint.
- Expanded diagnostics for device roles, selected endpoints, rendezvous, TCP setup, and handshake failures.
- Lower-latency Audio Link streaming using RTP/RTCP over UDP and libopus.
- Sender quality presets: Standard (32 kbps), Balanced (64 kbps), High (128 kbps), and Near lossless (256 kbps).
- Sender latency modes: Low latency and Stable.
- Improved audio statistics for configured and measured bitrate, packet loss, jitter, late drops, buffer level, and RTCP reports.
Important
Protocol v2 is not compatible with Protocol v1. Both devices must run WDCable 2.0.1 or another Protocol v2-compatible build.
Android 2.0.1 supports arm64-v8a and x86_64. The 32-bit armeabi-v7a ABI is not supported.
| Platform | Status | Repository |
|---|---|---|
| Android | Android 13+; arm64-v8a or x86_64 |
This repository |
| Windows | Separate companion client | WDCableWUI |
- Flutter SDK: installation guide
- Android Studio or VS Code
- An Android device with Wi-Fi Direct support
git clone https://github.com/jingcjie/WDCable_flutter.git
cd WDCable_flutter
flutter pub get
flutter run- Make sure Wi-Fi is enabled on both devices.
- Grant nearby-device, microphone, and notification permissions when Android asks.
- Keep both devices on the connection screen while pairing.
- If discovery fails, turn Wi-Fi off and on, then scan again.
- If a connection fails after updating one device, update the other device to WDCable 2.0.1 or another Protocol v2-compatible build.
- For Android-to-Windows testing, run the Windows companion app from WDCableWUI.
- Camera and video streaming over Wi-Fi Direct.
Contributions are welcome. For larger changes, please open an issue first so the implementation can be discussed before a pull request.
git checkout -b feature/your-feature
git commit -m "Add your feature"
git push origin feature/your-featureThen open a pull request.
Distributed under the MIT License. See LICENSE for more information.