MAX30102 Cảm biến đo nhịp tim và oxy trong máu SpO2

SƠ ĐỒ KẾT NỐI 

CÁC EXAMPLE CÓ SẴN ĐỂ GIAO TIẾP VỚI MAX3012:

#include <Wire.h>

#include "MAX30105.h"

#include "heartRate.h"

MAX30105 particleSensor;

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);

  Serial.println("Initializing...");

  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;

    }

  }

  Serial.print("IR=");

  Serial.print(irValue);

  Serial.print(", BPM=");

  Serial.print(beatsPerMinute);

  Serial.print(", Avg BPM=");

  Serial.print(beatAvg);

  if (irValue < 50000)

    Serial.print(" No finger?");

  Serial.println();

}