gistfile1.txt

void setup() {
  pinMode(A0, INPUT);
  Serial.begin(9600);
} //https://kitsguru.com/products/ky-039-finger-detection-heartbeat-measuring-sensor-module

void loop() {
  float pulse;
  int sum = 0;
  for (int i = 0; i < 20; i++)
    sum += analogRead(A0);
  pulse = sum / 20.00;
  Serial.println(pulse);
  delay(100);
} //CREDITS : https://electropeak.com/learn/interfacing-ky-039-finger-heartbeat-measuring-sensor-module-with-arduino/