Pi 5 Voice Assistant with Wake Word
Pi 5 Voice Assistant with Wake Word — Control Your Home with Voice, Completely Offline
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Transform a Raspberry Pi 5 into a privacy-first voice assistant that listens for your personal wake word — no internet, no cloud services, no eavesdropping. Speak a command and the Pi instantly triggers GPIO-connected relays to switch fans, lights, or any appliance. Built around the Vosk offline speech recognition engine, this kit teaches you how real-world voice interfaces work from the silicon up.
What You'll Build
You’ll assemble and program a custom voice-controlled relay station. A USB microphone captures audio, the Pi 5 processes speech locally, and upon detecting your trained wake word followed by a command like “turn on lamp,” it activates a 5V relay module. The onboard amplifier and speaker provide audible feedback. The result is a fully self-contained home automation node that respects your privacy and works without network dependencies.
What You'll Learn
- Train and deploy a custom wake word using Vosk’s small speech models
- Configure ALSA audio input/output on Raspberry Pi OS for low-latency capture
- Interface 5V relay modules with Pi GPIO and flyback diodes for safe inductive load switching
- Write Python scripts that parse real-time ASR callbacks and map commands to relay states
- Solder connectors, mount components, and debug audio interference in a physical enclosure
Kit Contents
| Component | Quantity |
|---|---|
| Raspberry Pi 5 4GB | 1 |
| USB Microphone | 1 |
| PAM8403 Amp | 1 |
| 3W 8Ω Speaker | 1 |
| 5V Relay Module | 2 |
| 1N4007 Diode | 5 |
| 10kΩ Resistors | 5 |
| M-F Wires | 20 |
| MicroSD Card 32GB | 1 |
| USB-C PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Ideal for B.Tech ECE/EEE final-year projects, Smart India Hackathon teams prototyping IoT voice control, and research scholars at IIT, NIT, VIT, or BITS exploring embedded NLP. Also suitable for CBSE Class 12 students with strong Python and electronics fundamentals who want a standout innovation project. If you already tinker with Raspberry Pi and seek the next challenge in on-device AI, this kit delivers a production-grade learning experience.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to reach the AI companion that knows every step of this project. You can also message our WhatsApp support for human help within 12 hours.
Can I use a custom wake word other than the default one?
Yes. The kit includes scripts and a Vosk adaptation guide to record your own wake word and fine-tune a small model. The AI companion walks you through the recording and replacement process.
Is internet required for the voice assistant to function?
No. All speech recognition happens offline on the Raspberry Pi 5 using Vosk. The assistant works even in a completely isolated network.
How many appliances can I control and what is the relay rating?
You get two 5V relay modules, each rated for up to 10A at 240V AC. You can expand by adding more relays and updating the Python script — the GPIO header has room for several additional channels.
Pi 5 runs Vosk offline speech recognition with custom wake word. Triggers GPIO relays on voice commands.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items