Note: Pins 2 and 3 are often used with the SoftwareSerial library to keep the main hardware serial free for debugging. 3. How the System Works

The processor compares the incoming sound frequency and "feature vectors" against templates pre-recorded during a training phase .

Once a match is found, the module sends a specific Command ID (e.g., "1" for "Lights On") over the TX pin to the Arduino, which then triggers a relay or LED. 4. Setup and Training

LEDs, relays (for high-power appliances), or a buzzer to confirm commands.

A 5V regulated DC supply is standard for these components. 2. Circuit Diagram Connection Guide

Building a voice recognition system circuit is usually done in one of two ways: using a (like the Elechouse V3 Go to product viewer dialog for this item.

Most modern modules use a "wake word" (like "Hello Robot") to listen for commands.

Before the circuit can recognize your voice, it must be trained: