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jknapp 6d4ae2e5c3 Initial commit: Alfred Mobile - AI Assistant Android App

- OAuth authentication via Authentik
- WebSocket connection to OpenClaw gateway
- Configurable gateway URL with first-run setup
- User preferences sync across devices
- Multi-user support with custom assistant names
- ElevenLabs TTS integration (local + remote)
- FCM push notifications for alarms
- Voice input via Google Speech API
- No hardcoded secrets or internal IPs in tracked files

2026-02-09 11:12:51 -08:00

2.6 KiB

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Wake Word Implementation Plan

Overview

Add "Hey Alfred" or "Alfred" wake word detection to activate voice input hands-free.

Technology Choice: Porcupine by Picovoice

Why Porcupine:

✅ On-device processing (no internet required)
✅ Low battery usage
✅ Free tier available (1 wake word, non-commercial)
✅ Android SDK available
✅ Custom wake words supported

Free Tier Limits:

1 user account
1 custom wake word model
Non-commercial use only
On-device processing (unlimited uses)

Implementation Steps

Go to https://console.picovoice.ai/
Create account
Get Access Key (free tier)
Train custom "Alfred" wake word

2. Add Porcupine SDK

Add to app/build.gradle.kts:

dependencies {
    implementation("ai.picovoice:porcupine-android:3.0.2")
}

3. Add to secrets.properties

PORCUPINE_ACCESS_KEY=<your-access-key-here>

4. Create WakeWordManager.kt

Similar to VoiceInputManager, this would:

Initialize Porcupine with the wake word model
Listen continuously in the background (low power mode)
Trigger voice input when wake word detected
Show visual feedback (e.g., pulse animation)

5. Add Background Service

Wake word detection needs to run in the background:

Foreground service with notification
Shows "Listening for 'Hey Alfred'..." notification
Can be toggled on/off from app
Respects battery optimization settings

6. UI Updates

Add toggle in settings or status bar:

"Wake Word Detection" switch
Shows when listening
Visual feedback when triggered (e.g., microphone icon pulses)

User Experience Flow

User enables "Wake Word Detection" in app
App starts background service
Notification shows: "Listening for 'Hey Alfred'"
User says "Hey Alfred" or "Alfred"
App shows visual feedback (screen lights up, icon pulses)
Voice input starts automatically
User speaks their message
Message auto-sends when done
Alfred responds with voice

Considerations

Battery Impact:

Porcupine is optimized for low power
Typically <1% battery drain per hour
Can be toggled off when not needed

Privacy:

All processing on-device
No audio sent to cloud
Only activates when wake word detected

Implementation Complexity:

Medium complexity (1-2 hours work)
Requires Porcupine setup
Need background service implementation
Permission handling (microphone always-on)

Next Steps

If you want this feature:

Create Picovoice account
Get Access Key
Train "Alfred" wake word model
I can implement the code integration

Let me know if you want to proceed with this! 🎤

2.6 KiB Raw Blame History