/**
Voice detecting respirator mask code by RenderMan
see www.renderlab.net/projects/goggles-v2 for build details

This code is rough, many nights at ENTS.ca, the Edmonton hackerspace drinking beer and hanging out

I'm just learning, it's mangled and copy and pasted from a bunch of different sources, mostly the default ardiono examples

It's ugly but it works.  Feel free to use, fold spindle and mutilate.

This code is creative commons if anyone cares

**/
const int analogInPin = A0; // Analog input pin that the audio is on
const int redPin = 11; //Digital pin for the Red leds
const int greenPin = 10; //Digital pin for the Red leds

int sound[4];
int soundav;

int sensorValue = 0;
int potValue = 0;        // value read from the pot for ambient noise compensation
int outputValue = 0;        // value output to the PWM (analog out)
int threshold = 0;


void setup() {
  // initialize serial communications at 9600 bps:
  Serial.begin(9600); 
  //Set pins
  pinMode(redPin, OUTPUT);     
  pinMode(greenPin, OUTPUT); 
  digitalWrite(greenPin, HIGH);
  digitalWrite(redPin, LOW);
  delay(100);
  
  pinMode(9,OUTPUT);
  pinMode(8,OUTPUT);
  //digitalWrite(9, HIGH);
  //digitalWrite(8, HIGH);
  delay(200);

  digitalWrite(9, LOW);
  digitalWrite(8, LOW);
  
  
}

void loop() {
  
  potValue = (analogRead(A1)/10); //read the pot value and divide by 10 to give me some granularity
//  threshold = map(potValue, 0, 1023, 0, 55);
//  threshold = (threshold / 10);
  
  sensorValue = analogRead(analogInPin);     // read the analog in value from the mic:         
      outputValue = map(sensorValue, 0, 1023, 0, 255); // map the 1024 possible mic values to the 255 range of our variable
      outputValue = ((outputValue - 128)); // after the mapping, the mics baseline is 128, so subtracting 128 will establish a new baseline of zero
      if (outputValue > (potValue)|| outputValue < (potValue -(2 * (potValue)))) { //if the output value (our variable for the mic output) is greater than the pot value (our adjustment for when to trigger the led to change)
      //The second part of the above line was conpensation for the arduino sampling on the low side of the wave form (a negative value), so boost the pot value to a positive and do an 'OR' operation which decides things
        digitalWrite(redPin, HIGH);           
        digitalWrite(greenPin, LOW);           
      }
      else{
        // if we turn the green off and red on (voice trigger), or the reverse which is the 'default' of green on and red off (silence, or below our threshold)
        digitalWrite(redPin, LOW);          
        digitalWrite(greenPin, HIGH); 
      }          

      // print the results to the serial monitor:
      Serial.print("soundav = " );                       
      Serial.print(soundav);      
      Serial.print("\t output = ");      
      Serial.print(outputValue);  
      Serial.print("\t potvalue = ");  
      Serial.println(potValue);

      // wait 10 milliseconds before the next loop
      // for the analog-to-digital converter to settle
      // after the last reading:
  delay(10);                     
    }
//}