3D Printed Heart Rate Indicator

#include <Wire.h>
#include <Adafruit_NeoPixel.h>
#include "MAX30105.h"
#include "heartRate.h"

//  Variables
#define LED_PIN        6     // Pin on EagLED that RGB LED Ring is connected to
#define NUMPIXELS 16 // LEDs attached to EagLED

const byte RATE_SIZE = 4; //Increase this for more averaging. 4 is good.
byte rates[RATE_SIZE]; //Array of heart rates
byte rateSpot = 0;
long lastBeat = 0; //Time at which the last beat occurred
float beatsPerMinute;
int beatAvg;

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);
MAX30105 particleSensor;

void setup() {
  Serial.begin(115200);
  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
  pixels.setBrightness(5);
  Serial.println("Initializing...");

  // Initialize sensor
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
  {
    Serial.println("MAX30105 was not found. Please check wiring/power. ");
    while (1);
  }
  Serial.println("Place your index finger on the sensor with steady pressure.");

  particleSensor.setup(); //Configure sensor with default settings
  particleSensor.setPulseAmplitudeRed(0x0A); //Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeGreen(0); //Turn off Green LED
}

#include <Wire.h>
#include <Adafruit_NeoPixel.h>
#include "MAX30105.h"
#include "heartRate.h"

//  Variables
#define LED_PIN        6     // Pin on EagLED that RGB LED Ring is connected to
#define NUMPIXELS 16 // LEDs attached to EagLED

const byte RATE_SIZE = 4; //Increase this for more averaging. 4 is good.
byte rates[RATE_SIZE]; //Array of heart rates
byte rateSpot = 0;
long lastBeat = 0; //Time at which the last beat occurred
float beatsPerMinute;
int beatAvg;

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);
MAX30105 particleSensor;

void setup() {
  Serial.begin(115200);
  pixels.begin(); // INITIALIZE NeoPixel object (REQUIRED)
  pixels.setBrightness(5);
  Serial.println("Initializing...");

  // Initialize sensor
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
  {
    Serial.println("MAX30105 was not found. Please check wiring/power. ");
    while (1);
  }
  Serial.println("Place your index finger on the sensor with steady pressure.");

  particleSensor.setup(); //Configure sensor with default settings
  particleSensor.setPulseAmplitudeRed(0x0A); //Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeGreen(0); //Turn off Green LED
}


void loop() {
  pixels.clear(); // Set all pixel colors to 'off'
  long irValue = particleSensor.getIR();

  if (checkForBeat(irValue) == true)
  {
    //We sensed a beat!
    long delta = millis() - lastBeat;
    lastBeat = millis();

    beatsPerMinute = 60 / (delta / 1000.0);

    if (beatsPerMinute < 255 && beatsPerMinute > 20)
    {
      rates[rateSpot++] = (byte)beatsPerMinute; //Store this reading in the array
      rateSpot %= RATE_SIZE; //Wrap variable

      //Take average of readings
      beatAvg = 0;
      for (byte x = 0 ; x < RATE_SIZE ; x++)
        beatAvg += rates[x];
      beatAvg /= RATE_SIZE;
    }
  }

  for (int i = 0; i < NUMPIXELS; i++) {
    if (irValue < 50000) {
      pixels.setPixelColor(i, pixels.Color(255, 255, 255));
      pixels.show();
    }
    else if (irValue > 50000) {
      if (beatAvg <= 60) {
        pixels.setPixelColor(i, pixels.Color(0, 150, 0));
        pixels.show();   // Send the updated pixel colors to the hardware.
      }
      else if (beatAvg > 100) {
        pixels.setPixelColor(i, pixels.Color(255, 0, 0));
        pixels.show();   // Send the updated pixel colors to the hardware.
      }
      else if (beatAvg < 100 && beatAvg > 60) {
        pixels.setPixelColor(i, pixels.Color(0, 0, 255));
        pixels.show();   // Send the updated pixel colors to the hardware.
      }
    }
  }
}