Raspberry Pi 5 Offline Voice Control Kit - Natural Language Home Automation
Raspberry Pi 5 Offline Voice Control Kit - Natural Language Home Automation
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine walking into your room and simply saying, "Turn on the study lamp." The light responds instantly, even with no internet connection. This kit lets you build exactly that - a completely offline voice-controlled relay system where a Raspberry Pi 5 runs Vosk's automatic speech recognition engine to understand your natural language commands, then fires MQTT messages to ESP32 relay nodes placed across your home.
What You'll Build
You assemble a Pi 5 server that listens on a USB microphone and processes speech locally. When you speak a phrase like "switch off the fan," the ASR engine decodes the intent and publishes an MQTT topic. Two ESP32 boards, each connected to a 5V relay, subscribe to those topics and toggle connected appliances accordingly. The entire chain works without any cloud dependency - your voice data never leaves the room.
What You'll Learn
- Integrating Vosk offline ASR on Raspberry Pi 5 for real-time natural language processing
- Configuring MQTT brokers and publishing/subscribing messages between Pi 5 and ESP32
- Programming ESP32 to receive MQTT commands and drive 5V relay modules
- Designing a multi-node home automation network using standard Wi-Fi and lightweight protocols
Kit Contents
| Component | Quantity |
|---|---|
| Raspberry Pi 5 4GB | 1 |
| USB Microphone | 1 |
| ESP32 Dev Board | 2 |
| 5V Relay Module | 2 |
| NVMe SSD 128GB | 1 |
| Pi 5 M.2 HAT+ | 1 |
| USB-C PSU | 1 |
| MicroUSB Cable | 2 |
| M-M Wires | 20 |
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
Designed for B.Tech ECE/EEE students working on IoT or embedded systems projects, Smart India Hackathon participants building voice-enabled solutions, and CBSE Class 11-12 students exploring natural language processing. Also fits ATL Tinkering Labs and hobbyists from IIT/NIT/VIT/BITS who want a hands-on understanding of offline ASR and MQTT-based control.
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 inside the box to launch the AI companion - it walks you through every connection and config file. If you need a human, our WhatsApp support is available for clarification.
Does this kit need an internet connection for voice commands?
No. Vosk runs the entire speech recognition pipeline offline on the Raspberry Pi 5. You only need Wi-Fi for the initial setup and to let the ESP32 boards join the local network.
Can I control AC appliances directly with the relays?
The 5V relay modules can switch low-voltage circuits safely. To control high-voltage appliances like fans or bulbs, connect the relay to a suitable contactor or use an appliance rated for the relay's contact load - always consult an electrician for mains wiring.
Is the NVMe SSD necessary or can I use a microSD card?
The SSD with M.2 HAT+ ensures fast boot times and smooth performance when loading Vosk's language models. A microSD card works too, but you may notice slower model load and occasional latency in speech processing.
Soil Analysis - Vosk offline ASR on Pi 5 parses natural language commands and triggers MQTT messages to ESP32 relay nodes across the home.
What's in this kit
- Raspberry Pi 5 4GB
- USB Microphone
- ESP32 Dev Board x2
- 5V Relay Module x2
- NVMe SSD 128GB
- Pi 5 M.2 HAT+
- USB-C PSU
- MicroUSB Cable x2
- M-M Wires x20
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