Multilingual Keyword Appliance Controller Kit with ESP32 + Relay
Build a Multilingual Offline Voice Appliance Controller with ESP32 & WakeNet (Hindi + English)
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 saying “Light on” or “Pankha chalu” and having your home appliances respond instantly — without ever connecting to the cloud. This kit places you at the heart of on-device voice AI, using Espressif’s ESP32-S3 and its WakeNet library to recognize keywords in Hindi and English. By the time you finish, you’ll have a fully functional 4-channel voice-controlled switchboard that listens, understands, and acts locally, giving you complete privacy and zero latency.
What You'll Build
A working voice-activated relay board that listens for your custom wake words like “Kitchen light” or “Pankha band”. You’ll control four separate 230V appliances through a robust 4-channel relay module, triggered entirely by your voice — no apps, no WiFi, no data ever leaving the board. The OLED displays the detected keyword, so you can see exactly what the AI heard, making debugging and demos a breeze.
What You'll Learn
- Configure and deploy ESP-IDF on ESP32-S3 with I2S microphone input for real-time audio capture
- Customize WakeNet keyword models to detect Hindi and English phrases of your choice
- Interface a 4-channel relay module with proper flyback diode protection using 1N4007 diodes
- Integrate an OLED display for live feedback, essential for any embedded voice interface
Kit Contents
| Component | Quantity |
|---|---|
| ESP32-S3 Dev Board | 1 |
| INMP441 I2S Mic | 1 |
| 4-ch Relay Module | 1 |
| 0.96in OLED | 1 |
| 1N4007 Diode | 5 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| M-F Wires | 20 |
| 5V 2A 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 CBSE Class 11-12 students exploring embedded AI for science exhibitions, B.Tech ECE/EEE undergraduates building voice-controlled automation for Smart India Hackathon, and ATL Tinkering Lab enthusiasts ready to move beyond basic Arduino. If you’re at IIT, NIT, VIT, or BITS and need a ready-to-build offline voice recognition system for a minor project, this kit gives you a head start with all parts and an AI mentor.
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?
Open the AI companion from the QR code included; it walks you through every step. If you prefer a human touch, WhatsApp our team directly — we respond within hours.
Does this kit need an internet connection to work?
No. All voice recognition runs locally on the ESP32-S3 using WakeNet. The kit is fully offline — no WiFi, no cloud, no data ever leaves the board.
Can I add my own custom keywords like “AC on” or “Fan off”?
Absolutely. The AI build companion guides you through recording samples and configuring WakeNet to detect any Hindi or English keywords you choose. You’ll even learn to adjust thresholds for reliable spotting.
Is it safe to control real 230V AC appliances with this kit?
The 4-channel relay module is rated for mains voltage, and we include 1N4007 diodes for flyback protection. However, always handle high‑voltage wiring with care. The AI companion and our WhatsApp support will flag safety steps, and we recommend asking for assistance if you’re new to AC circuits.
WakeNet detects keywords in Hindi and English to control four relay channels without any cloud service.
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.
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