Build a Wake Word Noise Alert System with ESP32-S3 — No Cloud, Instant Relay Response

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 dropping a small device in a classroom, library, or factory floor that instantly reacts to a spoken word like “silence” — not by phoning home to the cloud, but right there on the edge, in fractions of a second. That’s the heart of this kit: you train an ESP32-S3 to recognise a custom wake word using Espressif’s WakeNet engine, then flip a relay to trigger an alarm, log a noise complaint, or cut power to a noisy machine. No internet, no latency, and no monthly fees.

What You'll Build

You’ll assemble a compact sound-triggered unit that listens through a high-sensitivity I2S MEMS microphone. Every time a pre‑defined wake word is spoken, the onboard relay closes — ready to turn on a warning light, buzz a siren, or send a pulsed output to a data logger. The system operates entirely offline, making it perfect for schools, environmental monitoring camps, or any place where privacy and instant response matter.

What You'll Learn

• Configure Espressif WakeNet on an ESP32-S3 and inject your own wake word model without cloud training
• Interface an INMP441 I2S digital microphone for low‑latency audio capture and feature extraction
• Drive a 5V relay module safely, using flyback diodes to protect your circuit from inductive kicks
• Design a completely offline wake word detection pipeline with hard real‑time response

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students working on environmental science or physics projects will find a ready-to-adapt solution for noise monitoring. B.Tech ECE/EEE scholars can use it as an IoT lab assignment on edge AI and sensor interfacing. It’s also a strong fit for Smart India Hackathon environmental track, ATL Tinkering Labs wanting to demonstrate offline voice control, and IIT/NIT/VIT hobby clubs prototyping local automation.

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.