Example Code for Arduino - Get Heart Rate and Blood Oxygen Data

Hardware Preparation

• DFRduino UNO Controller x 1
• Fermion: MAX30102 Heart Rate and Oximeter Sensor V2.0 x 1
• M-M/F-M/F-F Jumper wires

Software Preparation

• Arduino IDE
• RTU Library
• Heart Rate Sensor Library and Sample Codes

RTU library is the modbus library transplanted for Arduino based on Modbus RTU protocol. Install the RTU library before use. About how to install the library?

Wiring Diagram

Sample Code

This sample requires the use of interrupt pins. Change the INT_PIN pin in the codes according to the master.

/*!
  * @file  gainHeartbeatSPO2.ino
  * @n experiment phenomena: get the heart rate and blood oxygenation, during the update the data obtained does not change
  * @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
  * @licence     The MIT License (MIT)
  * @author      PengKaixing([email protected])
  * @version     V1.0
  * @date        2021-06-21
  * @get         from https://www.dfrobot.com
  * @url         https://github.com/DFRobot/DFRobot_BloodOxygen_S
*/
#include "DFRobot_BloodOxygen_S.h"

#define I2C_COMMUNICATION  //use I2C for communication, but use the serial port for communication if the line of codes were masked

#ifdef  I2C_COMMUNICATION
#define I2C_ADDRESS    0x57
  DFRobot_BloodOxygen_S_I2C MAX30102(&Wire ,I2C_ADDRESS);
#else
/* ---------------------------------------------------------------------------------------------------------------
 *    board   |             MCU                | Leonardo/Mega2560/M0 |    UNO    | ESP8266 | ESP32 |  microbit  |
 *     VCC    |            3.3V/5V             |        VCC           |    VCC    |   VCC   |  VCC  |     X      |
 *     GND    |              GND               |        GND           |    GND    |   GND   |  GND  |     X      |
 *     RX     |              TX                |     Serial1 TX1      |     5     |   5/D6  |  D2   |     X      |
 *     TX     |              RX                |     Serial1 RX1      |     4     |   4/D7  |  D3   |     X      |
 * ---------------------------------------------------------------------------------------------------------------*/
#if defined(ARDUINO_AVR_UNO) || defined(ESP8266)
SoftwareSerial mySerial(4, 5);
DFRobot_BloodOxygen_S_SoftWareUart MAX30102(&mySerial, 9600);
#else
DFRobot_BloodOxygen_S_HardWareUart MAX30102(&Serial1, 9600); 
#endif
#endif

void setup()
{
  Serial.begin(115200);
  while (false == MAX30102.begin())
  {
    Serial.println("init fail!");
    delay(1000);
  }
  Serial.println("init success!");
  Serial.println("start measuring...");
  MAX30102.sensorStartCollect();
}

void loop()
{
  MAX30102.getHeartbeatSPO2();
  Serial.print("SPO2 is : ");
  Serial.print(MAX30102._sHeartbeatSPO2.SPO2);
  Serial.println("%");
  Serial.print("heart rate is : ");
  Serial.print(MAX30102._sHeartbeatSPO2.Heartbeat);
  Serial.println("Times/min");
  Serial.print("Temperature value of the board is : ");
  Serial.print(MAX30102.getTemperature_C());
  Serial.println(" ℃");
  //The sensor updates the data every 4 seconds
  delay(4000);
  //Serial.println("stop measuring...");
  //MAX30102.sensorEndCollect();
}

Result

Stop the measurements after measuring the heart rate and blood oxygen content for 5 times.