Marcio Tamagushi
Published © GPL3+

Speech Recognition with Arduino and BitVoicer Server

Controls a few LEDs using an Arduino and Speech Recognition.

BeginnerFull instructions provided38,005
Speech Recognition with Arduino and BitVoicer Server

Things used in this project

Hardware components

Arduino Micro
Arduino Micro
×1
BitVoicer Server
×1
Sparkfun Electret Microphone Breakout
×1
BitVoicer Server 1.0
×1
LED (generic)
LED (generic)
×3
Resistor 330 ohm
Resistor 330 ohm
×3

Story

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Schematics

Schematics

Code

BVS_Demo1.ino

Arduino
#include <BVSP.h>
#include <BVSMic.h>

// Defines the Arduino pin that will be used to capture audio 
#define BVSM_AUDIO_INPUT 5

// Defines the LED pins
#define RED_LED_PIN 6
#define YELLOW_LED_PIN 9
#define GREEN_LED_PIN 10

// Defines the constants that will be passed as parameters to 
// the BVSP.begin function
const unsigned long STATUS_REQUEST_TIMEOUT = 1000;
const unsigned long STATUS_REQUEST_INTERVAL = 2000;

// Defines the size of the audio buffer 
const int AUDIO_BUFFER_SIZE = 64;

// Defines the size of the receive buffer
const int RECEIVE_BUFFER_SIZE = 2;

// Initializes a new global instance of the BVSP class 
BVSP bvsp = BVSP();

// Initializes a new global instance of the BVSMic class 
BVSMic bvsm = BVSMic();

// Creates a buffer that will be used to read recorded samples 
// from the BVSMic class 
byte audioBuffer[AUDIO_BUFFER_SIZE];

// Creates a buffer that will be used to read the commands sent
// from BitVoicer Server.
// Byte 0 = pin number
// Byte 1 = pin value
byte receiveBuffer[RECEIVE_BUFFER_SIZE];

void setup() 
{
  // Sets up the pin modes
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  
  // Starts serial communication at 115200 bps 
  Serial.begin(115200); 
  
  // Sets the Arduino serial port that will be used for 
  // communication, how long it will take before a status request 
  // times out and how often status requests should be sent to 
  // BitVoicer Server. 
  bvsp.begin(Serial, STATUS_REQUEST_TIMEOUT, STATUS_REQUEST_INTERVAL);
    
  // Defines the function that will handle the frameReceived 
  // event 
  bvsp.frameReceived = BVSP_frameReceived; 
  
  // Prepares the BVSMic class timer 
  bvsm.begin();
}

void loop() 
{
  // Checks if the status request interval has elapsed and if it 
  // has, sends a status request to BitVoicer Server 
  bvsp.keepAlive();
  
  // Checks if there is data available at the serial port buffer 
  // and processes its content according to the specifications 
  // of the BitVoicer Server Protocol 
  bvsp.receive();

  // Checks if there is one SRE available. If there is one, 
  // starts recording.
  if (bvsp.isSREAvailable()) 
  {
    // If the BVSMic class is not recording, sets up the audio 
    // input and starts recording 
    if (!bvsm.isRecording)
    {
      bvsm.setAudioInput(BVSM_AUDIO_INPUT, EXTERNAL); 
      bvsm.startRecording();
    }

    // Checks if the BVSMic class has available samples 
    if (bvsm.available)
    {
      // Makes sure the inbound mode is STREAM_MODE before 
      // transmitting the stream
      if (bvsp.inboundMode == FRAMED_MODE)
        bvsp.setInboundMode(STREAM_MODE); 
        
      // Reads the audio samples from the BVSMic class
      int bytesRead = bvsm.read(audioBuffer, AUDIO_BUFFER_SIZE);
      
      // Sends the audio stream to BitVoicer Server
      bvsp.sendStream(audioBuffer, bytesRead);
    }
  }
  else
  {
    // No SRE is available. If the BVSMic class is recording, 
    // stops it.
    if (bvsm.isRecording)
      bvsm.stopRecording();
  }
}

// Handles the frameReceived event 
void BVSP_frameReceived(byte dataType, int payloadSize) 
{
  // Checks if the received frame contains binary data
  // 0x07 = Binary data (byte array)
  if (dataType == DATA_TYPE_BINARY)
  {
    // If 2 bytes were received, process the command.
    if (bvsp.getReceivedBytes(receiveBuffer, RECEIVE_BUFFER_SIZE) == 
      RECEIVE_BUFFER_SIZE)
    {
      analogWrite(receiveBuffer[0], receiveBuffer[1]);
    }
  }
}

Credits

Marcio Tamagushi
3 projects • 52 followers
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Related channels and tags
  • Arduino
  • Voice
  • Voice