Arduino IDE编写ESP32和MAX30102获取心率的代码

可以参考以下代码：

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

#define REPORTING_PERIOD_MS     1000

MAX30105 particleSensor;

void setup()
{
  Serial.begin(115200);
  while (!Serial);

  Serial.println("Initializing...");
  
  particleSensor.begin(Wire, I2C_SPEED_FAST); // Use default I2C port, 400kHz speed
  
  byte ledBrightness = 60; //Options: 0=Off to 255=50mA
  byte sampleAverage = 4; //Options: 1, 2, 4, 8, 16, 32
  byte ledMode = 3; //Options: 1 = Red only, 2 = Red + IR, 3 = Red + IR + Green
  int sampleRate = 100; //Options: 50, 100, 200, 400, 800, 1000, 1600, 3200
  int pulseWidth = 411; //Options: 69, 118, 215, 411
  int adcRange = 4096; //Options: 2048, 4096, 8192, 16384

  particleSensor.setup(ledBrightness, sampleAverage, ledMode, sampleRate, pulseWidth, adcRange); //Configure sensor with these settings
  
  Serial.println("Place your index finger on the sensor with steady pressure.");

}

void loop()
{
  int8_t numberOfSamples = 10;
  int8_t offset = -10;
  int bpm;
  
  //reading from MAX30102
  while (!particleSensor.available());
  float irValue = particleSensor.getIR();
  particleSensor.nextSample();
  int32_t bufferLength = particleSensor.getFIFOWritePointer() - particleSensor.getFIFOReadPointer();
  if (bufferLength < 0) bufferLength += 32; //Wrap condition
  if (bufferLength > 2)
  {
    byte bytes[bufferLength];
    particleSensor.readFIFO(bytes, bufferLength); //read from MAX30102 FIFO
    bpm = getHeartRate(bytes, bufferLength, numberOfSamples, offset); //get heart rate from samples
    if (bpm > 50 && bpm < 200) //valid heart rate
    {
      Serial.print("Heart rate: ");
      Serial.print(bpm);
      Serial.println(" bpm");

      delay(REPORTING_PERIOD_MS);
    }
  }
}

在这个示例中，我们使用了 MAX30102 心率传感器库和心率计算的库。我们首先将传感器配置为所需的设置，然后循环获取心率数据并计算心率。最后，通过串口打印出心率数据。

请注意，在这个示例中，我们使用的是 MAX30105 库，因为它与 MAX30102 兼容，并且带有一些额外的功能。您需要将 MAX30102 与 Arduino 的 I2C 总线连接，并将其正确连接到 ESP32 上。