// Moving average filter
// to remove a tremor when moving a rotary knob
const int potentiometerPin = 36;
int potValue = 0;

const int lengthAverageFilt = 100;
int filtArray[lengthAverageFilt];

int getAverage(int avArray[], int noElements){
  int sum = 0;
  for (int i = 0; i < noElements; i++){
    sum = sum+avArray[i];
  }
  return sum/noElements;
}

void setup() {
  Serial.begin(115200);

}

int filtArrayIndex = 0;
int filtValue = 0;

void loop() {
  potValue = analogRead(potentiometerPin);


  filtArray[filtArrayIndex] = potValue;
  filtValue = getAverage(filtArray,lengthAverageFilt);

  double degreeValue = (potValue * 360 ) / (4095);
  Serial.print("Angular = ");
  Serial.print(degreeValue);
  Serial.print("degrees");

  double degreeValueFilt = (filtValue * 360 ) / (4095);
  Serial.print("Angular filtered = ");
  Serial.print(degreeValueFilt);
  Serial.println("degrees");

  filtArrayIndex++;
  if (filtArrayIndex==lengthAverageFilt){
    filtArrayIndex = 0;
  }

  delay(100);
}