Interfacing Speak (Voice) Recognition Module with Arduino

Speak (Voice) Recognition Module

A Speak (Voice) Recognition Module is a device that allows Arduino to recognize and respond to voice commands. It is widely used in smart home automation, robotics, and accessibility applications for hands-free control.

Working Principle of Voice Recognition Module

The Voice Recognition Module works by processing audio input, converting it into digital signals, and matching it against pre-recorded voice commands. When a match is found, the module outputs a corresponding signal to the Arduino for further actions.

Types of Voice Recognition Modules

Offline Voice Recognition Module

  • Stores predefined voice commands.
  • Matches input speech with stored commands.
  • Outputs a signal based on the recognized command.

Online Voice Recognition Module

  • Records voice input and sends it to a cloud server.
  • Processes speech using AI-based recognition.
  • Returns a response or control signal to the Arduino.

Requirements

Pin Configuration of Voice Recognition Module

Basic Voice Recognition Module

  • VCC: Connect to +5V on Arduino.
  • GND: Connect to GND on Arduino.
  • RX: Connect to TX on Arduino.
  • TX: Connect to RX on Arduino.

Wiring the Voice Recognition Module to Arduino

To connect the Voice Recognition Module to Arduino, connect the VCC and GND pins to +5V and GND on the Arduino. Connect the RX and TX pins to the Arduino’s TX and RX pins, respectively, for serial communication.

Algorithm

  1. Initialize Components

    • Connect the VCC and GND pins of the Voice Recognition Module to +5V and GND on the Arduino.
    • Connect the RX and TX pins to the respective TX and RX pins on the Arduino.

  2. Write the Code

    • Set up serial communication in the setup() function.
    • Train and store voice commands in the module.
    • Listen for voice commands and execute corresponding actions.

  3. Display Values or Control Devices

    • Print recognized voice commands to the serial monitor.
    • Use recognized commands to control devices such as lights, motors, or home automation systems.

  4. Test the Project

    • Upload the code to the Arduino.
    • Test the module by speaking predefined commands and observing the response.
1#include <SoftwareSerial.h>
2#include "VoiceRecognitionV3.h"
3
4// Connect Voice module to pin 2 (RX), pin 3 (TX)
5SoftwareSerial voiceSerial(2, 3); // RX, TX
6VR myVR(voiceSerial);  // Create voice object
7
8uint8_t records[7]; // Save record numbers
9uint8_t buf[64];
10
11void setup() {
12  Serial.begin(9600);
13  voiceSerial.begin(9600);
14  
15  if (myVR.begin()) {
16    Serial.println("Voice Module Ready.");
17  } else {
18    Serial.println("Voice Module not found.");
19    while (1);
20  }
21
22  if (myVR.load((uint8_t)0, 7) >= 0) {
23    Serial.println("Voice commands loaded.");
24  }
25}
26
27void loop() {
28  int ret = myVR.recognize(buf, 50);
29  if (ret > 0) {
30    switch (buf[1]) {
31      case 0:
32        Serial.println("Command 0: Turn LED On");
33        // do something
34        break;
35      case 1:
36        Serial.println("Command 1: Turn LED Off");
37        // do something
38        break;
39      case 2:
40        Serial.println("Command 2: Move Forward");
41        break;
42      default:
43        Serial.println("Unknown Command");
44        break;
45    }
46  }
47}
48

Applications of Voice Recognition Modules

  • Smart home automation
  • Voice-controlled robots
  • Assistive technology for disabled individuals
  • Hands-free control of electronic devices
  • Security and access control systems
  • Interactive AI assistants

Conclusion

Interfacing a Speak (Voice) Recognition Module with Arduino enables hands-free control of various devices. These modules are useful in smart homes, assistive technology, and interactive robotics. With simple wiring and coding, you can integrate voice recognition into your projects effortlessly.