const int pot = A0;
const int LED_RED = 9;

const int windowSize = 10;
int index = windowSize - 1;
int readings[windowSize];
int total = 0;

const float oneAngle = 270. / 255;
int convertSensorValue = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600); // Инициализация последовательного порта
  pinMode(LED_RED, OUTPUT);

  pinMode(pot, INPUT);
}

int determineRelativeAngle(const int& convertSensorValue)
{
  float angle = oneAngle * convertSensorValue;
  int res = angle - 135;
  return res;
}

int filter(const int& sensorValue)
{
  total -= readings[index];
  readings[index] = sensorValue;
  total += readings[index];
  int average = total / windowSize;
  --index;
  index = (index < 0) ? windowSize - 1 : index;
  return average;
}

void loop() {
  // put your main code here, to run repeatedly:
  int sensorValue = analogRead(pot);
  int average = filter(sensorValue);
  convertSensorValue = map(average, 0, 1023, 0, 255);
  analogWrite(LED_RED, convertSensorValue);
  int relativeAngle = determineRelativeAngle(convertSensorValue);
  Serial.println(relativeAngle);

  delay(100);

}