ESP32 Offline Voice Recognition Using Edge Impulse

ESP32 Offline Voice Recognition Using Edge Impulse

Build an ESP32 speech recognition offline system with Edge Impulse to create your own ESP32 voice assistant using an INMP441 microphone for hands-free control.

Voice recognition is becoming an essential part of the Internet of Things (IoT), allowing us to control, monitor, and interact with devices hands-free.

At its core, ESP32 speech to text works by capturing audio through a microphone, processing it, and converting it into text that devices can understand.

This text is then used to trigger commands, just like how Alexa or Google Assistant responds to your voice.

ESP32 offline voice recognition systems often use a mix of edge and cloud computing, with some processing done directly on the device and the rest handled in the cloud.

For more information on sound detection, check out this detailed guide on detecting the direction of sound using Arduino.

Build your own voice assistant with ESP32 and Edge Impulse.

Author summary: Build ESP32 voice assistant.

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Circuit Digest Circuit Digest — 2025-11-05