ESP32 Offline Voice Command IoT Switch Kit: Build a Voice-Activated Relay with Edge AI

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 “lights on” and your desk lamp switches on instantly – without an internet connection, without a smart speaker, and without uploading your voice to the cloud. With this kit, you will train an ESP32-S3 to recognise your own keywords using Edge Impulse, then wire a relay to control actual appliances. It is a complete offline voice control system you build and program yourself.

What You'll Build

You will build a voice‑activated switch that responds to custom keywords like “on”, “off”, and “dim”. The relay module lets you safely control a lamp, fan, or any low‑power AC device. You will also create a portable voice‑controlled light indicator with the included LEDs, so you can prototype your command pipeline before connecting appliances.

What You'll Learn

• Capture high‑quality voice data with the INMP441 I2S microphone
• Train a keyword‑spotting model in Edge Impulse without writing ML code
• Deploy the model on an ESP32-S3 for real‑time, offline inference
• Control a relay and LED loads based on voice commands — safely

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

If you are a CBSE Class 11 or 12 student building an AI project for your practicals, this kit gives you a ready‑to‑train pipeline for voice recognition. B.Tech ECE/EEE students can use it for IoT mini‑projects or Smart India Hackathon prototypes where offline voice control adds a privacy‑first edge. ATL Tinkering Labs will find the step‑by‑step build and AI companion perfect for exploring embedded ML.

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.