BPM_modified_GettingStartedProject.ino

/*  PulseSensor Starter Project and Signal Tester
    The Best Way to Get Started  With, or See the Raw Signal of, your PulseSensor.com™ & Arduino.

    Here is a link to the tutorial
    https://pulsesensor.com/pages/code-and-guide

    WATCH ME (Tutorial Video):
    https://www.youtube.com/watch?v=RbB8NSRa5X4


  -------------------------------------------------------------
  1) This shows a live human Heartbeat Pulse.
  2) Live visualization in Arduino's Cool "Serial Plotter".
  3) Blink an LED on each Heartbeat.
  4) This is the direct Pulse Sensor's Signal.
  5) A great first-step in troubleshooting your circuit and connections.
  6) "Human-readable" code that is newbie friendly."

*/

//  Variables
int PulseSensorPurplePin = 0;        // Pulse Sensor PURPLE WIRE connected to ANALOG PIN 0
int LED13 = 13;   //  The on-board Arduion LED

int Signal;                // holds the incoming raw data. Signal value can range from 0-1024
int Threshold = 550;            // Determine which Signal to "count as a beat", and which to ingore.

// The SetUp Function:
void setup() {
  pinMode(LED13, OUTPUT);        // pin that will blink to your heartbeat!
  Serial.begin(9600);         // Set's up Serial Communication at certain speed.

}

// The Main Loop Function
void loop() {

  Signal = analogRead(PulseSensorPurplePin);  // Read the PulseSensor's value.
  // Assign this value to the "Signal" variable.

  unsigned long time = millis();      // Current run time in milliseconds.
  Serial.print(time);                 // Print the time in ms to serial output
  Serial.print("\t");                 // Print a tab to separate the time from the signal
  Serial.println(Signal);             // Send the Signal value to Serial Plotter.

  if (Signal > Threshold) {           // If the signal is above "550", 
    digitalWrite(LED13, HIGH);        // then "turn-on" Arduino's on-Board LED.
  } else {
    digitalWrite(LED13, LOW);         // Else, the sigal must be below "550", 
                                      // so "turn-off" this LED.
  }
  delay(10);
}