Offline Voice Command Recorder Kit – ESP32-S3 & Edge Impulse for 4-Sound Classification

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 a device that wakes up to a specific clap pattern, a whistle, or a spoken command—without any internet connection. This Voice Command Recorder Kit uses the ESP32-S3 and INMP441 MEMS microphone to capture studio-quality audio and run an on-device machine learning model that classifies four distinct sound classes instantly. Whether you’re prototyping a privacy-respecting smart home trigger or building a hackathon demo that reacts to ambient sounds, the entire inference pipeline stays offline, keeping your data local and latency near zero.

What You'll Build

You'll assemble a standalone voice command recorder that listens continuously through the INMP441 I2S microphone. As soon as a trained sound is detected—say a knock, a clap, or your own voice command—the 0.96-inch OLED displays the recognized class name, and the WS2812B LED strip lights up in a unique color for that sound. The whole system runs on TensorFlow Lite Micro inside the ESP32-S3, needing no cloud service, so you can take it anywhere.

What You'll Learn

• Capturing high-fidelity audio with an I2S MEMS microphone
• Designing and training a custom sound classifier on Edge Impulse
• Deploying a TensorFlow Lite Micro model to ESP32-S3 for real-time inference
• Driving an OLED display and addressable WS2812B LEDs from inferenced outputs

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11-12 students building AI-based science exhibitions, B.Tech ECE/EEE sophomores prototyping for Smart India Hackathon, and ATL Tinkering Labs introducing edge computing. If you’re comfortable with basic Arduino programming and want to leap into on-device machine learning, this kit provides every component and the guided build path you need.

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.