SpO2 sensor Arduino sketch

spo2_sensor.ino

const int SENSOR_PIN = 0;
const int AMOUNT = 20;

int averageLevel = 0;
int averageIndex = 0;

/**
 * The Pulse Oximeter sketch is an Arduino sketch intended for use with an
 * analog sensor reading the amount of light passing through a human finger.
 *
 * It could be made more generically into an analog signal averaging sketch.
 * There is nothing here that specifically deals with heart rate measurement.
 */
void setup() {
    pinMode(0, INPUT);
    pinMode(1, INPUT);
    Serial.begin(19200);
}

void loop() {
  delay(10);
  printDots(analogRead(0));
//  Serial.println(analogRead(0));
}

void printDots(int value) {
  int count = (value / 10) - 30;
  while (count > 0) {
    Serial.print("X");
    --count;
  }
  Serial.println("");
}