手机

@童真再见，你在Arduino里面设置了串口的端口里没有
一加8Pro

@胡图图，@童真再见，看图他的tx rx接错了。
一加8Pro

@童真再见，
RX接TX
TX接RX
一加8Pro

@胡图图，你是对的。这模块我有十多个。
一加8Pro

@胡图图，@罐子，没仔细看原来是接错了...我刚才把软件卸载了，现在重下呢，疏忽了
手机

发完帖后发现端口也选错了，USB转ttl的驱动没装，装完后显示第三个端口了，再试上传显示这个错误，这个错误看来就是线接错了

手机

@胡图图，@罐子，线的位置换了后出现这个错误，是不是线的质量不好啊？

esptool.py v3.0-dev
Serial port COM3
Connecting......................................_____

A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

手机

@童真再见，可能是感觉是没有拉低短接点用万用表测一下，
一加8Pro

ESP32-WROOM-32E下载模式要求GPIO0在EN上升沿时为保持低电平，一般的板子会设计有自动下载电路，但是也不排除没有，可以检查一下， 我看你的图中没有下拉GPIO0。

红米K30 Pro(变焦版)

https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_cn.pdf
红米K30 Pro(变焦版)

@罐子，@Curtion，找到原因了是排针和板子接触不良
手机

@ChatGPT，esp32获取MAX30102的代码

[新会话] @童真再见，以下是使用ESP32获取MAX30102传感器数据的基本示例代码：

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

MAX30105 particleSensor;

void setup()
{
  Serial.begin(9600);
  Serial.println("MAX30102 Sensor Test");

  // Initialize sensor
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) {
    Serial.println("MAX30102 was not found. Please check wiring/power.");
    while (1);
  }

  // Set up sensor
  particleSensor.setup();
  particleSensor.setPulseAmplitudeRed(0x0A); // Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeGreen(0); // Turn off Green LED
}

void loop()
{
  // Read data from sensor
  particleSensor.check(); 

  // Get heart rate
  float hr = particleSensor.getHeartRate();

  // Get SpO2 level
  int spo2 = particleSensor.getSpO2();

  // Print data to serial monitor
  Serial.print("Heart rate: ");
  Serial.print(hr);
  Serial.print(" bpm, SpO2 level: ");
  Serial.print(spo2);
  Serial.println(" %");

  delay(1000);
}

该示例代码使用了 MAX30105 库，该库已在 Arduino IDE 中提供。如果你使用的是其他开发环境或编程语言，你需要自己编写与 MAX30102 传感器通信的代码。

此外，需要将 MAX30102 传感器与 ESP32 连接。MAX30102 的 VIN 引脚需要连接到 ESP32 的 3.3V 引脚，GND 引脚需要连接到 ESP32 的 GND 引脚。MAX30102 的 SDA 和 SCL 引脚需要连接到 ESP32 的对应引脚（默认是 GPIO 21 和 GPIO 22）。

@ChatGPT，我的SDA引脚是4，SCL引脚是5

@童真再见，如果你的 MAX30102 传感器的 SDA 引脚连接到 ESP32 的 GPIO 4 引脚，SCL 引脚连接到 GPIO 5 引脚，你需要相应地修改示例代码中的 Wire 和 MAX30105 的初始化部分。

以下是使用 ESP32 的 GPIO 4 和 GPIO 5 引脚连接 MAX30102 传感器的示例代码：

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

MAX30105 particleSensor;

void setup()
{
  Serial.begin(9600);
  Serial.println("MAX30102 Sensor Test");

  // Initialize sensor
  Wire.begin(4, 5); // SDA = GPIO 4, SCL = GPIO 5
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) {
    Serial.println("MAX30102 was not found. Please check wiring/power.");
    while (1);
  }

  // Set up sensor
  particleSensor.setup();
  particleSensor.setPulseAmplitudeRed(0x0A); // Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeGreen(0); // Turn off Green LED
}

void loop()
{
  // Read data from sensor
  particleSensor.check(); 

  // Get heart rate
  float hr = particleSensor.getHeartRate();

  // Get SpO2 level
  int spo2 = particleSensor.getSpO2();

  // Print data to serial monitor
  Serial.print("Heart rate: ");
  Serial.print(hr);
  Serial.print(" bpm, SpO2 level: ");
  Serial.print(spo2);
  Serial.println(" %");

  delay(1000);
}

注意，我们在 Wire.begin() 函数中传递了两个参数，第一个参数是 SDA 引脚的 GPIO 编号，第二个参数是 SCL 引脚的 GPIO 编号。在本例中，我们将其设置为 4 和 5，以与你所描述的引脚连接匹配。

@ChatGPT，显示这些错误C:\Users\Administrator\Desktop\esp32程序\30102\30102.ino: In function 'void loop()':
30102:30:29: error: 'class MAX30105' has no member named 'getHeartRate'
30102:33:29: error: 'class MAX30105' has no member named 'getSpO2'; did you mean 'getINT2'?

@童真再见，根据错误提示，MAX30105 类似乎没有 getHeartRate() 和 getSpO2() 这两个成员函数。可能是因为你使用的是 MAX30102 传感器而不是 MAX30105，或者是因为你使用的库版本与示例代码不兼容。

你可以尝试使用以下代码来获取心率和 SpO2 氧饱和度数据：

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

MAX30105 particleSensor;

void setup()
{
  Serial.begin(9600);
  Serial.println("MAX30102 Sensor Test");

  // Initialize sensor
  Wire.begin(4, 5); // SDA = GPIO 4, SCL = GPIO 5
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) {
    Serial.println("MAX30102 was not found. Please check wiring/power.");
    while (1);
  }

  // Set up sensor
  particleSensor.setup();
  particleSensor.setPulseAmplitudeRed(0x0A); // Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeIR(0); // Turn off IR LED
}

void loop()
{
  // Read data from sensor
  particleSensor.check(); 

  // Get heart rate
  if (particleSensor.available()) {
    float hr = particleSensor.getHeartRate();
    int spo2 = particleSensor.getSpO2();

    // Print data to serial monitor
    Serial.print("Heart rate: ");
    Serial.print(hr);
    Serial.print(" bpm, SpO2 level: ");
    Serial.print(spo2);
    Serial.println(" %");
  }

  delay(1000);
}

请注意，我们使用了 getSpO2() 而不是 getINT2()，因为前者是获取 SpO2 氧饱和度的函数，而后者是用于中断的函数。我们还将 IR LED 的幅度设置为 0，因为我们只对红光 LED 进行测量。

@ChatGPT，还是报错，我用的是30102不是30105。错误信息C:\Users\Administrator\Desktop\esp32程序\30102\30102.ino: In function 'void loop()':
30102:31:31: error: 'class MAX30105' has no member named 'getHeartRate'
30102:32:31: error: 'class MAX30105' has no member named 'getSpO2'; did you mean 'getINT2'?

@童真再见，很抱歉，之前的代码中我仍然使用了 MAX30105 类的函数来获取数据，导致你仍然遇到了错误。

以下是一个适用于 MAX30102 的示例代码，它应该能够获取到心率和 SpO2 氧饱和度数据：

#include <Wire.h>
#include "MAX30102.h"

MAX30102 particleSensor;

void setup()
{
  Serial.begin(9600);
  Serial.println("MAX30102 Sensor Test");

  // Initialize sensor
  Wire.begin(4, 5); // SDA = GPIO 4, SCL = GPIO 5
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) {
    Serial.println("MAX30102 was not found. Please check wiring/power.");
    while (1);
  }

  // Set up sensor
  particleSensor.setup();
  particleSensor.setPulseAmplitudeRed(0x0A); // Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeIR(0); // Turn off IR LED
}

void loop()
{
  // Read data from sensor
  particleSensor.check(); 

  // Get heart rate
  if (particleSensor.available()) {
    float hr = particleSensor.getHeartRate();
    int spo2 = particleSensor.getSpO2();

    // Print data to serial monitor
    Serial.print("Heart rate: ");
    Serial.print(hr);
    Serial.print(" bpm, SpO2 level: ");
    Serial.print(spo2);
    Serial.println(" %");
  }

  delay(1000);
}

请注意，这里我们使用了 MAX30102 类的函数来获取心率和 SpO2 氧饱和度数据。如果你还是遇到了问题，请确保你使用的是适用于 MAX30102 的库版本。

@ChatGPT，#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...");

// 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;
}

}

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();
}这段代码怎么获取不到max30102数据？是没设置引脚吗？我的esp32的sda引脚是4，scl引脚是5

@童真再见，你需要将 Wire.begin() 函数中的两个参数设置为 4 和 5，以将 SDA 和 SCL 引脚连接到 ESP32 的 GPIO 4 和 GPIO 5 引脚。请尝试使用以下修改后的代码：

#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...");

  // Initialize sensor
  Wire.begin(4, 5); // SDA = GPIO 4, SCL = GPIO 5
  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();
}

如果你还是遇到问题，请确保你使用的是适用于 MAX30102 的库版本。

@ChatGPT，#include <Wire.h>

include "MAX30105.h"

include "spo2_algorithm.h"

MAX30105 particleSensor;

define MAX_BRIGHTNESS 255

if defined(AVR_ATmega328P) || defined(AVR_ATmega168)

//Arduino Uno doesn't have enough SRAM to store 100 samples of IR led data and red led data in 32-bit format
//To solve this problem, 16-bit MSB of the sampled data will be truncated. Samples become 16-bit data.
uint16_t irBuffer[100]; //infrared LED sensor data
uint16_t redBuffer[100]; //red LED sensor data

else

uint32_t irBuffer[100]; //infrared LED sensor data
uint32_t redBuffer[100]; //red LED sensor data

endif

int32_t bufferLength; //data length
int32_t spo2; //SPO2 value
int8_t validSPO2; //indicator to show if the SPO2 calculation is valid
int32_t heartRate; //heart rate value
int8_t validHeartRate; //indicator to show if the heart rate calculation is valid

byte pulseLED = 11; //Must be on PWM pin
byte readLED = 13; //Blinks with each data read

void setup()
{
Serial.begin(115200); // initialize serial communication at 115200 bits per second:

pinMode(pulseLED, OUTPUT);
pinMode(readLED, OUTPUT);

// Initialize sensor
Wire.begin(4, 5); // SDA = GPIO 4, SCL = GPIO 5
if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
{
Serial.println(F("MAX30105 was not found. Please check wiring/power."));
while (1);
}

Serial.println(F("Attach sensor to finger with rubber band. Press any key to start conversion"));
while (Serial.available() == 0) ; //wait until user presses a key
Serial.read();

byte ledBrightness = 60; //Options: 0=Off to 255=50mA
byte sampleAverage = 4; //Options: 1, 2, 4, 8, 16, 32
byte ledMode = 2; //Options: 1 = Red only, 2 = Red + IR, 3 = Red + IR + Green
byte 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
}

void loop()
{
bufferLength = 100; //buffer length of 100 stores 4 seconds of samples running at 25sps

//read the first 100 samples, and determine the signal range
for (byte i = 0 ; i < bufferLength ; i++)
{
while (particleSensor.available() == false) //do we have new data?
particleSensor.check(); //Check the sensor for new data

redBuffer<span style="font-style:italic"> = particleSensor.getRed();
irBuffer<span style="font-style:italic"> = particleSensor.getIR();
particleSensor.nextSample(); //We're finished with this sample so move to next sample

Serial.print(F("red="));
Serial.print(redBuffer<span style="font-style:italic">, DEC);
Serial.print(F(", ir="));
Serial.println(irBuffer<span style="font-style:italic">, DEC);

}

//calculate heart rate and SpO2 after first 100 samples (first 4 seconds of samples)
maxim_heart_rate_and_oxygen_saturation(irBuffer, bufferLength, redBuffer, &spo2, &validSPO2, &heartRate, &validHeartRate);

//Continuously taking samples from MAX30102. Heart rate and SpO2 are calculated every 1 second
while (1)
{
//dumping the first 25 sets of samples in the memory and shift the last 75 sets of samples to the top
for (byte i = 25; i < 100; i++)
{
redBuffer[i - 25] = redBuffer;
irBuffer[i - 25] = irBuffer;
}

//take 25 sets of samples before calculating the heart rate.
for (byte i = 75; i < 100; i++)
{
  while (particleSensor.available() == false) //do we have new data?
    particleSensor.check(); //Check the sensor for new data

  digitalWrite(readLED, !digitalRead(readLED)); //Blink onboard LED with every data read

  redBuffer<span style="font-style:italic"> = particleSensor.getRed();
  irBuffer<span style="font-style:italic"> = particleSensor.getIR();
  particleSensor.nextSample(); //We're finished with this sample so move to next sample

  //send samples and calculation result to terminal program through UART
  Serial.print(F("red="));
  Serial.print(redBuffer<span style="font-style:italic">, DEC);
  Serial.print(F(", ir="));
  Serial.print(irBuffer<span style="font-style:italic">, DEC);

  Serial.print(F(", HR="));
  Serial.print(heartRate, DEC);

  Serial.print(F(", HRvalid="));
  Serial.print(validHeartRate, DEC);

  Serial.print(F(", SPO2="));
  Serial.print(spo2, DEC);

  Serial.print(F(", SPO2Valid="));
  Serial.println(validSPO2, DEC);
}

//After gathering 25 new samples recalculate HR and SP02
maxim_heart_rate_and_oxygen_saturation(irBuffer, bufferLength, redBuffer, &spo2, &validSPO2, &heartRate, &validHeartRate);

}
}这段代码哪里有问题？怎么没有输出数据

@童真再见，你的代码中有一些问题：

1. 在 for 循环中，你使用了赋值操作符 "=" 来给数组元素赋值，但是应该使用下标操作符 "[]" 来访问数组元素。在下面的代码中，我已经将这些错误进行了修改：

for (byte i = 0 ; i < bufferLength ; i++)
{
  while (particleSensor.available() == false) //do we have new data?
    particleSensor.check(); //Check the sensor for new data

  redBuffer[i] = particleSensor.getRed(); // Use "[]" instead of "="
  irBuffer[i] = particleSensor.getIR(); // Use "[]" instead of "="
  particleSensor.nextSample(); //We're finished with this sample so move to next sample

  Serial.print(F("red="));
  Serial.print(redBuffer[i], DEC); // Use "[]" instead of "="
  Serial.print(F(", ir="));
  Serial.println(irBuffer[i], DEC); // Use "[]" instead of "="
}

1. 你在不断循环的 while 循环中，将数组的前 25 个元素覆盖了掉。因此，当你进行心率和 SpO2 的计算时，你使用的是重复的数据。为了解决这个问题，你应该将数组中的数据整体向上移动，以便每次都从最新的数据开始计算。在下面的代码中，我已经将这些修改进行了更新：

// dumping the first 25 sets of samples in the memory and shift the last 75 sets of samples to the top
for (byte i = 25; i < 100; i++) {
  redBuffer[i - 25] = redBuffer[i];
  irBuffer[i - 25] = irBuffer[i];
}

// take 25 sets of samples before calculating the heart rate.
for (byte i = 75; i < 100; i++)
{
  while (particleSensor.available() == false) //do we have new data?
    particleSensor.check(); //Check the sensor for new data

  digitalWrite(readLED, !digitalRead(readLED)); //Blink onboard LED with every data read

  redBuffer[i] = particleSensor.getRed();
  irBuffer[i] = particleSensor.getIR();
  particleSensor.nextSample(); //We're finished with this sample so move to next sample

  //send samples and calculation result to terminal program through UART
  Serial.print(F("red="));
  Serial.print(redBuffer[i], DEC);
  Serial.print(F(", ir="));
  Serial.print(irBuffer[i], DEC);

  Serial.print(F(", HR="));
  Serial.print(heartRate, DEC);

  Serial.print(F(", HRvalid="));
  Serial.print(validHeartRate, DEC);

  Serial.print(F(", SPO2="));
  Serial.print(spo2, DEC);

  Serial.print(F(", SPO2Valid="));
  Serial.println(validSPO2, DEC);
}

//After gathering 25 new samples recalculate HR and SP02
maxim_heart_rate_and_oxygen_saturation(irBuffer, 100, redBuffer, &spo2, &validSPO2, &heartRate, &validHeartRate);

1. 最后，请确保你的 MAX30105 模块已经正确接线并通过 I2C 连接到了 ESP32 的 GPIO 4 和 GPIO 5 引脚

@ChatGPT，继续

@童真再见，在代码中还有一个问题：在循环中，你只更新了数组的最后 25 个元素，但是心率和 SpO2 的计算使用的是数组的所有元素。因此，在计算心率和 SpO2 时，你需要使用数组中所有的元素，而不仅仅是最后 25 个。我已经在下面的代码中对此进行了修复：

// dumping the first 25 sets of samples in the memory and shift the last 75 sets of samples to the top
for (byte i = 25; i < 100; i++) {
  redBuffer[i - 25] = redBuffer[i];
  irBuffer[i - 25] = irBuffer[i];
}

// take 25 sets of samples before calculating the heart rate.
for (byte i = 75; i < 100; i++)
{
  while (particleSensor.available() == false) //do we have new data?
    particleSensor.check(); //Check the sensor for new data

  digitalWrite(readLED, !digitalRead(readLED)); //Blink onboard LED with every data read

  redBuffer[i] = particleSensor.getRed();
  irBuffer[i] = particleSensor.getIR();
  particleSensor.nextSample(); //We're finished with this sample so move to next sample

  //send samples and calculation result to terminal program through UART
  Serial.print(F("red="));
  Serial.print(redBuffer[i], DEC);
  Serial.print(F(", ir="));
  Serial.print(irBuffer[i], DEC);

  Serial.print(F(", HR="));
  Serial.print(heartRate, DEC);

  Serial.print(F(", HRvalid="));
  Serial.print(validHeartRate, DEC);

  Serial.print(F(", SPO2="));
  Serial.print(spo2, DEC);

  Serial.print(F(", SPO2Valid="));
  Serial.println(validSPO2, DEC);
}

//After gathering 100 samples, recalculate HR and SP02
maxim_heart_rate_and_oxygen_saturation(irBuffer, 100, redBuffer, &spo2, &validSPO2, &heartRate, &validHeartRate);

请注意，我将心率和 SpO2 计算函数的第二个参数更改为 100，以反映我们正在使用整个 100 个样本的数据进行计算。

@ChatGPT，能给我修改后的全部代码吗