DF2301Q Is not responding

I tried the suggestions except for resetModule() because it's not available when connected via I2C.

I tried turning on mute mode then turning it off just to see if that would clear something. I tried without setMuteMode(1) first which didn't make a difference.

It's still not working.

I updated my setup code to this:

void setup()

{

  byte error;

  byte address=0x64;

  Serial.begin(115200);

  Serial.println("Starting Setup()");

  // Wait for the DF2301Q to be detected

  Wire.begin();

  error=1;

  while (error!=0)

  {

    Wire.beginTransmission(address);

    error = Wire.endTransmission();

    if (error!=0)

    {

      Serial.println(">>> DF2301Q not detected <<<");

      delay(2000);

    }

  }

  // Wait for the DF2301Q to initialize. Somebody suggested this to prevent it from locking up

  delay(6000);

  // Initialize the DF2301Q

  while (!(asr.begin()))

  {

    Serial.println("Communication DF2301Q failed");

    delay(3000);

  }

  Serial.println("Begin ok!");

  //asr.resetModule(); Not available in I2C

  asr.setVolume(7); // 1-7

  asr.setMuteMode(1); // 1=mute 0=unmute

  asr.setMuteMode(0); // 1=mute 0=unmute

  asr.setWakeTime(120); // 0-255

  Serial.print("Wake time: ");

  Serial.println(asr.getWakeTime());

  asr.playByCMDID(1);  

  Serial.println("Exit Setup()");

}

I purchased a new DF2301Q board and it is working fine with this code.
I'm still wondering what could have caused the first board to fail like this.

Thanks for everybody's help!
 

After a little more testing

void setup()

{

  byte error;

  byte address=0x64;

  Serial.begin(115200);

  Serial.println("In Setup()");

  delay(6000);

  Wire.begin();

  Wire.beginTransmission(address);

  error = Wire.endTransmission();

  if (error==0)

  {

    Serial.print("I2C detected at 0x");

    Serial.println(address, HEX);

  }

  else

    Serial.println(">>> I2C not detected <<<");

  while (!(asr.begin()))

  {

    Serial.println("Communication with device failed, please check connection");

    delay(3000);

  }

  Serial.println("Begin ok!");

  //asr.setVolume(7); // 1-7

  //asr.setMuteMode(0); // 1=mute 0=unmute

  asr.setWakeTime(120); // 0-255

  Serial.print("Wake time: ");

  Serial.println(asr.getWakeTime());

  asr.playByCMDID(1);  

  Serial.println("Exit Setup()");

}

Serial Monitor Output:
In Setup()

I2C detected at 0x64

Begin ok!

Wake time: 120

Exit Setup()

I get “You are welcome to use the voice recognition system”
Then “Yes, I am here”
The blue ASR LED is lit.
And then it times out after 2 minutes and says “I'm off now”.

It does not recognize any commands I say when the ASR LED is lit or when it's off “Hello Robot” does not work. 
It acts like the mic is turned off.

Help!  I'm out of idea's at this point.  
 

First, check the two tiny mic holes on the module aren't clogged with dust

If that's not it, hook it up via I2C and try running asr.playByCMDID(1) in your setup — that forces it into wake-up state directly, and if the blue LED lights up then you know the ASR chip is good and it's just the wake-word mic path acting up. From there you can also try asr.setVolume(7) to crank it up and asr.setWakeTime(20) just to rule out any weird config drift.

The library also has a resetModule() function if you're using UART mode, which is worth a shot if the I2C tricks don't help. Good luck, hope you get it talking again!