OpenClaw → Even Realities G2 smart glasses bridge.

Expo/React Native iOS app that receives messages from OpenClaw (via Telegram webhook on clawdbot) and pushes them to Even G2 glasses over BLE using the reverse-engineered protocol. Also supports voice recording, transcription, and sending messages back to Telegram.

┌──────────────┐  Telegram   ┌──────────────┐  WebSocket   ┌──────────────┐  BLE   ┌──────────┐
│  Harbinger   │ ──────────► │  clawdbot    │ ───────────► │  G2Bridge    │ ──────►│  Even G2 │
│  (OpenClaw)  │             │  VPS bridge  │              │  iOS App     │        │  Glasses │
└──────────────┘             └──────────────┘              └──────────────┘        └──────────┘
                              100.77.111.100                iPhone BLE
                                    ▲                            │
                                    │         Voice msg          │
                                    └────────────────────────────┘
                                     POST /api/g2/transcribe
                                     POST /api/g2/telegram

The app uses a hybrid gesture system:

1. BLE notifications — All notifications from the G2 glasses on the CHAR_NOTIFY characteristic are passed through a gesture classifier. Known patterns are mapped to actions; unknown patterns are logged for future reverse-engineering.
2. On-screen buttons — The app has a large mic button that mirrors the double-tap behavior (tap to start recording, tap again to stop and send).
3. Display wake toggle — A switch on the main screen sends wake/sleep packets to the G2 display.

Note: The G2 touchpad gesture BLE notification format isn't fully reverse-engineered yet. The classifier includes educated guesses based on the protocol structure. All unknown notifications are logged so we can decode new gesture patterns over time.

• BLE connection to G2 glasses (react-native-ble-plx)
• WebSocket client to receive messages from bridge server
• Teleprompter protocol for display rendering
• Audio recording (expo-av) with transcription
• Haptic feedback (expo-haptics) on gestures
• Gesture detection from BLE notifications
• Background BLE mode

• Express server with WebSocket
• Receives webhook POSTs from OpenClaw
• Pushes messages to connected iOS app clients
• Audio transcription endpoint (Whisper-ready)
• Telegram send endpoint

• Ported from i-soxi/even-g2-protocol
• CRC-16/CCITT, varint encoding, packet builder
• Auth handshake, teleprompter service, display config
• Display wake/sleep commands

cd server
npm install
node index.js  # Runs on port 3847

cd app
npm install
npx expo prebuild --platform ios
npx expo run:ios  # Requires dev build (no Expo Go — BLE needs native modules)

cd app
npx eas build --profile development --platform ios

• BLE Service UUID: 00002760-08c2-11e1-9073-0e8ac72e0000
• Write Characteristic: ...5401
• Notify Characteristic: ...5402
• Display: 25 chars × 10 lines per page, min 14 pages
• Auth: 7-packet handshake, no PIN required
• Display Wake: service 0x04-20, payload 0x08 0x01
• Display Sleep: service 0x04-20, payload 0x08 0x00

• Wire up Whisper API on server (uncomment in index.js, set OPENAI_API_KEY)
• Wire up Telegram bot API on server (uncomment in index.js, set tokens)
• Decode more G2 BLE gesture notification patterns from logged data
• Add R1 ring gesture support (separate BLE connection)
• Background recording support
• Push notifications for urgent messages