ESP32 Voice Command Recorder Kit: Custom Wake Word, Offline Control
Your Custom Wake Word, No Cloud
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 saying a secret word - the lamp flicks on instantly. No internet, no cloud listening, just a tiny device on your desk that knows your voice. This kit gives you everything to build that offline voice command recorder using an ESP32-S3 and a 5V relay. You'll train it with any custom wake word you choose, from 'Lumos' to 'Hello Room'. Perfect for a privacy-first smart home gadget you code yourself.
What You'll Build
A self-contained module that listens for your unique keyword and toggles a relay. Connect a lamp, fan, or any small appliance. The processing happens entirely on the ESP32-S3's neural network accelerator, so your voice data never leaves the board.
What You'll Learn
- Train a custom wake word model using ESP-Skainet and the WakeNet engine - no deep learning PhD required
- Interface an I2S MEMS microphone (INMP441) for clear, low-latency audio capture
- Control a 5V relay safely with a 1N4007 flyback diode to protect against inductive voltage spikes
- Build a complete breadboard circuit with LEDs and resistors to visually test the relay state
Kit Contents
| Component | Quantity |
|---|---|
| ESP32-S3 Dev Board | 1 |
| INMP441 I2S Mic | 1 |
| 5V Relay Module | 1 |
| 5mm White LED | 3 |
| 1N4007 Diode | 3 |
| 10k? Resistors | 5 |
| 220? Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| Micro USB Cable | 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
This kit is built for the curious maker in India. It's a perfect fit for CBSE Class 11-12 students designing voice interface projects for their computer science practicals, B.Tech ECE/EEE first-years tackling mini-projects, ATL Tinkering Lab innovators, and Smart India Hackathon participants. Even students from IIT, NIT, VIT, and BITS Pilani use it to explore on-device AI without relying on cloud APIs.
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 on the box to chat with our AI companion, trained on this exact project. It can walk you through troubleshooting step by step. For human help, WhatsApp us - our support team typically responds within 2 hours.
Does this kit need an internet connection?
No - the ESP32-S3 runs a pre-trained WakeNet model entirely on-device. Once the firmware is flashed, it works offline forever. You only need a computer to upload the code initially.
Can I control a ceiling fan or other appliance?
The included 5V relay is rated for small loads up to 10A at 250V AC - enough for table lamps, fans, or phone chargers. For heavier appliances like air conditioners, you'd need an external contactor, which is a great next project. Always unplug before wiring.
Can I change the wake word later?
Absolutely. The kit guide teaches you how to record your own samples, retrain the model, and reflash the ESP32. You can have different wake words for different projects.
Voice - Say a custom keyword to toggle lamp relay. ESP32-S3 WakeNet runs on-device - works fully offline.
What's in this kit
- ESP32-S3 Dev Board
- INMP441 I2S Mic
- 5V Relay Module
- 5mm White LED x3
- 1N4007 Diode x3
- 10k? Resistors x5
- 220? Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- Micro USB Cable
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