listen grep tool for arduino

listen_arduino

int beatPin = 3;
int baudRate = 9600;
int ledPin[] = {6,7,8,9,10,11,12,13};

void ledOn(int num){
  for(int i = 0; i < 8; i++){
    if(bitRead(num,i)==1){
      digitalWrite(ledPin[i], HIGH);
    }
  }
  for(int i = 0; i < 8; i++){
    digitalWrite(ledPin[i], LOW);
  }
}

void setup(){
  Serial.begin(baudRate);
  pinMode(beatPin, OUTPUT);
  for(int num = 0; num < 8; num++){
    pinMode(ledPin[num], OUTPUT);
  }
}

int incomingByte = 0;
void loop(){
  if( Serial.available() > 0 ){
    incomingByte = Serial.read();
    int frequency = incomingByte * 10 + 40;
    Serial.println(incomingByte);
    ledOn(incomingByte);
    tone(beatPin, frequency);
  }else{
    noTone(beatPin);
  }
}