// These constants won't change.  They're used to give names
// to the pins used:
const int analogInPin = 1;  // Analog input pin that the potentiometer is attached to
const int analogOutPin = 13; // Analog output pin tha2b357d16t the LED is attached to

int sensorValue = 0;        // value read from the pot
int outputValue = 0;        // value output to the PWM (analog out)

int i = 0;

int sample = 30;
float rawArray[30];
int raw;

float averageRaw;
float sumRaw;
//replace with AREF voltage?
float referenceVoltage;

#define CHAR_ESC '\x1B'

void setup() 
{
  Serial.begin(57600); 
  //analogReference(EXTERNAL);
  referenceVoltage = 5;
  //referenceVoltage = 4.79;
}

void loop() {
  // read the analog in value:
  sensorValue = analogRead(analogInPin);            
  // map it to the range of the analog out:
  outputValue = map(sensorValue, 0, 1023, 0, 255);  
  // change the analog out value:
  analogWrite(analogOutPin, outputValue);           

  float raw = analogRead(analogInPin);    
  
  //Calculation 1 = Average over 30 loops
  rawArray[i] = raw;

  for (int i = 0; i < 30; i++) 
    sumRaw = sumRaw + rawArray[i];

  averageRaw = sumRaw/sample;
  //Arduino analogReads in a value 0-1024
  float voltDivisor = 1024/referenceVoltage;
  float volts = averageRaw/voltDivisor; 
  float kelvin = (volts * 1000)/10;
  float celcius = kelvin - 273.15; 

  Serial.print( CHAR_ESC ) ;
  Serial.print( 'E' ) ; // clear screen
  Serial.print("averaged=");
  Serial.print(celcius);
  Serial.print(" C");  
  // voltage divisor = 1024/5v = 204.8  
  volts = raw/voltDivisor; 
  kelvin = (volts * 1000)/10;
  // convert to kelvin:   [°C] = [K] − 273.15
  celcius = kelvin - 273.15; 
  Serial.print(" raw=");
  Serial.print(celcius);
  Serial.print(" C");
  
  Serial.println("");
  Serial.print("kelvin=");
  Serial.print(kelvin);
  Serial.print(" K");
  
  Serial.println("");
  
  Serial.print("voltageDivisor=");
  Serial.print(voltDivisor);  
  Serial.print(" volts=");
  Serial.print(volts);
  
  Serial.println("");
  
  Serial.print("referenceVoltage=");
  Serial.print(referenceVoltage);
  
  

  i++;
  if (i >= sample) {
    i = 0;
  }
  sumRaw = 0;

  // wait n milliseconds before the next loop
  // for the analog-to-digital converter to settle
  // after the last reading:
  int n = 200;
  delay(n);                     
}