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Nabu AI Voice Assistant — Raspberry Pi 5 Edition

Meet Nabu — a self-contained, always-listening AI voice assistant that lives entirely in your home. No cloud subscriptions. No data leaving your network. No monthly fees. Just natural conversation, persistent memory, and smart home control, powered by a Raspberry Pi 5 that sits quietly on your shelf and listens for your voice.

Say “Ok Nabu” and Nabu wakes up instantly. It hears you through a high-fidelity USB microphone, transcribes your words locally using OpenAI’s Whisper model running on your own hardware, thinks through your request using a full large language model, and speaks back in a warm, natural voice — all within seconds. It remembers what you told it last week. It knows your preferences. It learns who you are over time.

Unlike consumer voice assistants that funnel every word through corporate servers, Nabu processes everything locally on your network. Your conversations stay yours. The AI runs on your machines. The memory lives in your database. You own it completely.

Under the hood, Nabu is an orchestrated stack of best-in-class open source technologies — Wyoming satellite protocol for audio streaming, Whisper for speech recognition, Piper for lifelike text-to-speech, pgvector for long-term semantic memory, and an agentic reasoning engine that can use tools, search its memory, and control your Home Assistant smart home devices. A real-time audio visualizer shares the microphone and responds to sound with light, giving Nabu a physical presence and letting you know it’s alive and listening.

This is not a toy. This is a professional-grade, fully configurable AI assistant platform built for people who want the power of modern AI without sacrificing privacy, control, or extensibility.

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Features

Object	Benefit	Feature
Raspberry Pi 5 (8GB)	Enough horsepower to run the full stack without lag	Quad-core ARM Cortex-A76, dedicated PCIe, runs 24/7 at low power
Logitech USB Microphone	Crisp, clear voice pickup from across the room	Cardioid polar pattern, 16kHz sample rate, plug-and-play USB
Audio Visualizer	See that Nabu is alive and responding — a physical presence in the room	Shares mic input with Whisper via PulseAudio so both run simultaneously without conflict
OpenWakeWord	Hands-free activation — no button press, no app	Local wake word detection, always listening for “Ok Nabu”
Whisper STT (local)	Your voice never leaves your home network	On-device speech-to-text transcription, no cloud API calls
Piper TTS	Natural, human-quality voice responses	Neural text-to-speech, 48kHz audio output
Ollama LLM Proxy	A real AI brain, not a scripted chatbot	Routes conversation through full LLaMA 3.1 8B model running on local hardware
pgvector Memory Database	Nabu remembers you — conversations, preferences, facts — across sessions	Semantic vector search over persistent memory stored in Postgres, extracts and recalls facts automatically
Agentic Tool Engine	Nabu doesn’t just answer — it acts	Multi-round reasoning loop with tool calls: search memory, query smart home, look up information
Home Assistant Integration	Control your lights, thermostat, locks, and 3,000+ integrations by voice	Full Wyoming protocol satellite, native HA assist pipeline, bidirectional smart home control
100% Local Network	Privacy by design — your data never touches a third-party server	No cloud dependency, no subscriptions, all processing on-premises
Pre-configured Stack	Plug it in and start talking — no Linux expertise required	All services pre-installed, systemd-managed, auto-start on boot

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