■ MAX30102 산소포화도, 심박수 측정 센서 모듈 블루투스

---<  MAX30102_HeartRate_BlueTooth.ino  >-----------------------------------------------
#include <Wire.h>
#include "MAX30105.h"
#include <SoftwareSerial.h>

#include "heartRate.h"

MAX30105 particleSensor;
SoftwareSerial HC06(2,3);

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;

void setup() {
  Serial.begin(115200);
  HC06.begin(9600);
  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() {
  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;

      if (irValue < 50000){
        //Serial.println(" No finger?");
        HC06.println("0,0");
      }else{
        HC06.println("1,"+ String(beatAvg));
        //Serial.print("IR=");
        //Serial.print(irValue);
        //Serial.print(", BPM=");
        //Serial.print(beatsPerMinute);
        //Serial.print(", Avg BPM=");
        //Serial.println(beatAvg);
      }
    }
  }

}
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