How To Make Pulse Oximeter

6 Jun

How To Make Pulse Oximeter

Hello friends, this is an Oximeter which measure Oxygen saturation on blood also measure heartbeat rate just using your finger. At this CORONA pandemic pulse Oximeter is very essential to measure heartbeat rate and oxygen saturation. Just follow all the step and make your own Pulse Oximeter.

Components :

Arduino nano : https://amzn.to/3z8C2IM
Max 30100 Sensor : https://robu.in/product/max30100-pulse-oximeter-heart-rate-sensor-module/
Power bank Module : https://amzn.to/3ppeqv1
SSD 1306 Display : https://robu.in/product/0-96-inch-yellow-yellow-blue-oled-lcd-led-display-module/

Connection Diagram :

Code :

#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define ENABLE_MAX30100 1
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 //64 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
// The pins for I2C are defined by the Wire-library.
// On an arduino UNO:       A4(SDA), A5(SCL)
// On an arduino MEGA 2560: 20(SDA), 21(SCL)
// On an arduino LEONARDO:   2(SDA),  3(SCL), ...
#define OLED_RESET    4 // 4 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#if ENABLE_MAX30100
#define REPORTING_PERIOD_MS     5000
// PulseOximeter is the higher level interface to the sensor
// it offers:
//  * beat detection reporting
//  * heart rate calculation
//  * SpO2 (oxidation level) calculation
PulseOximeter pox;
#endif
uint32_t tsLastReport = 0;
int xPos = 0;
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
  Serial.println("Beat!");
  heart_beat(&xPos);
}
void setup()
{
  Serial.begin(115200);
  Serial.println("SSD1306 128x64 OLED TEST");
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Don't proceed, loop forever
  }
  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  //display.display();
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(20, 18);
  // Display static text
  display.print("Pulse OxiMeter");
  int temp1 = 0;
  int temp2 = 40;
  int temp3 = 80;
  heart_beat(&temp1);
  heart_beat(&temp2);
  heart_beat(&temp3);
  xPos = 0;
  display.display();
  delay(2000); // Pause for 2 seconds
  display.cp437(true);
  display.clearDisplay();
  Serial.print("Initializing pulse oximeter..");
#if ENABLE_MAX30100
  // Initialize the PulseOximeter instance
  // Failures are generally due to an improper I2C wiring, missing power supply
  // or wrong target chip
  if (!pox.begin()) {
    Serial.println("FAILED");
    for (;;);
  } else {
    Serial.println("SUCCESS");
  }
  // The default current for the IR LED is 50mA and it could be changed
  //   by uncommenting the following line. Check MAX30100_Registers.h for all the
  //   available options.
  pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
  // Register a callback for the beat detection
  pox.setOnBeatDetectedCallback(onBeatDetected);
  display_data(0, 0);
#endif
}
void loop()
{
#if ENABLE_MAX30100
  // Make sure to call update as fast as possible
  pox.update();
  int bpm = 0;
  int spo2 = 0;
  // Asynchronously dump heart rate and oxidation levels to the serial
  // For both, a value of 0 means "invalid"
  if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
    //Serial.print("Heart rate:");
    bpm = pox.getHeartRate();
    spo2 = pox.getSpO2();
    Serial.println(bpm);
    //Serial.print("bpm / SpO2:");
    Serial.println(spo2);
    //Serial.println("%");
    tsLastReport = millis();
    display_data(bpm, spo2);
  }
#endif
  drawLine(&xPos);
}
void display_data(int bpm, int spo2) {

display.fillRect(0, 18, 127, 15, BLACK);
  //if(bpm ==0 && spo2==0){
 //    display.setTextSize(1);
 // display.setTextColor(WHITE);
  //display.setCursor(0, 18);
  // Display static text
 // display.print("Fingure Out");
  //}
  display.fillRect(0, 18, 127, 15, BLACK);
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 18);
  // Display static text
  display.print("BPM ");
  display.setTextSize(2);
  display.print(bpm);
  display.display();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(64, 18);
  // Display static text
  display.print("Spo2% ");
  display.setTextSize(2);
  display.println(spo2);
  display.display();
}
void drawLine(int *x_pos) {
  // Draw a single pixel in white
  display.drawPixel(*x_pos, 8, WHITE);
  display.drawPixel((*x_pos)++, 8, WHITE);
  display.drawPixel((*x_pos)++, 8, WHITE);
  display.drawPixel((*x_pos)++, 8, WHITE);
  display.drawPixel((*x_pos), 8, BLACK);  // -----
  //Serial.println(*x_pos);
  display.fillRect(*x_pos, 0, 31, 16, BLACK);
  display.display();
  //delay(1);
  if (*x_pos >= SCREEN_WIDTH) {
    *x_pos = 0;
  }
}
void heart_beat(int *x_pos) {
  /************************************************/
  //display.clearDisplay();
  display.fillRect(*x_pos, 0, 30, 15, BLACK);
  // Draw a single pixel in white
  display.drawPixel(*x_pos + 0, 8, WHITE);
  display.drawPixel(*x_pos + 1, 8, WHITE);
  display.drawPixel(*x_pos + 2, 8, WHITE);
  display.drawPixel(*x_pos + 3, 8, WHITE);
  display.drawPixel(*x_pos + 4, 8, BLACK); // -----
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 5, 7, WHITE);
  display.drawPixel(*x_pos + 6, 6, WHITE);
  display.drawPixel(*x_pos + 7, 7, WHITE); // .~.
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 8, 8, WHITE);
  display.drawPixel(*x_pos + 9, 8, WHITE); // --
  //display.display();
  //delay(1);
  /******************************************/
  display.drawPixel(*x_pos + 10, 8, WHITE);
  display.drawPixel(*x_pos + 10, 9, WHITE);
  display.drawPixel(*x_pos + 11, 10, WHITE);
  display.drawPixel(*x_pos + 11, 11, WHITE);
  //display.display();
  //delay(1);
  /******************************************/
  display.drawPixel(*x_pos + 12, 10, WHITE);
  display.drawPixel(*x_pos + 12, 9, WHITE);
  display.drawPixel(*x_pos + 12, 8, WHITE);
  display.drawPixel(*x_pos + 12, 7, WHITE);
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 13, 6, WHITE);
  display.drawPixel(*x_pos + 13, 5, WHITE);
  display.drawPixel(*x_pos + 13, 4, WHITE);
  display.drawPixel(*x_pos + 13, 3, WHITE);
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 14, 2, WHITE);
  display.drawPixel(*x_pos + 14, 1, WHITE);
  display.drawPixel(*x_pos + 14, 0, WHITE);
  display.drawPixel(*x_pos + 14, 0, WHITE);
  //display.display();
  //delay(1);
  /******************************************/
  display.drawPixel(*x_pos + 15, 0, WHITE);
  display.drawPixel(*x_pos + 15, 1, WHITE);
  display.drawPixel(*x_pos + 15, 2, WHITE);
  display.drawPixel(*x_pos + 15, 3, WHITE);
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 15, 4, WHITE);
  display.drawPixel(*x_pos + 15, 5, WHITE);
  display.drawPixel(*x_pos + 16, 6, WHITE);
  display.drawPixel(*x_pos + 16, 7, WHITE);
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 16, 8, WHITE);
  display.drawPixel(*x_pos + 16, 9, WHITE);
  display.drawPixel(*x_pos + 16, 10, WHITE);
  display.drawPixel(*x_pos + 16, 11, WHITE);
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 17, 12, WHITE);
  display.drawPixel(*x_pos + 17, 13, WHITE);
  display.drawPixel(*x_pos + 17, 14, WHITE);
  display.drawPixel(*x_pos + 17, 15, WHITE);
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 18, 15, WHITE);
  display.drawPixel(*x_pos + 18, 14, WHITE);
  display.drawPixel(*x_pos + 18, 13, WHITE);
  display.drawPixel(*x_pos + 18, 12, WHITE);
  //display.display();
  //delay(1);
  display.drawPixel(*x_pos + 19, 11, WHITE);
  display.drawPixel(*x_pos + 19, 10, WHITE);
  display.drawPixel(*x_pos + 19, 9, WHITE);
  display.drawPixel(*x_pos + 19, 8, WHITE);
  //display.display();
  //delay(1);
  /****************************************************/
  display.drawPixel(*x_pos + 20, 8, WHITE);
  display.drawPixel(*x_pos + 21, 8, WHITE);
  //display.display();
  //delay(1);
  /****************************************************/
  display.drawPixel(*x_pos + 22, 7, WHITE);
  display.drawPixel(*x_pos + 23, 6, WHITE);
  display.drawPixel(*x_pos + 24, 6, WHITE);
  display.drawPixel(*x_pos + 25, 7, WHITE);
  //display.display();
  //delay(1);
  /************************************************/
  display.drawPixel(*x_pos + 26, 8, WHITE);
  display.drawPixel(*x_pos + 27, 8, WHITE);
  display.drawPixel(*x_pos + 28, 8, WHITE);
  display.drawPixel(*x_pos + 29, 8, WHITE);
  display.drawPixel(*x_pos + 30, 8, WHITE); // -----
  *x_pos = *x_pos + 30;
  display.display();
  delay(1);
}

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#include <Wire.h>

#include "MAX30100_PulseOximeter.h"

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define ENABLE_MAX30100 1

#define SCREEN_WIDTH 128 // OLED display width, in pixels

#define SCREEN_HEIGHT 32 //64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)

// The pins for I2C are defined by the Wire-library.

// On an arduino UNO: A4(SDA), A5(SCL)

// On an arduino MEGA 2560: 20(SDA), 21(SCL)

// On an arduino LEONARDO: 2(SDA), 3(SCL), ...

#define OLED_RESET 4 // 4 // Reset pin # (or -1 if sharing Arduino reset pin)

#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#if ENABLE_MAX30100

#define REPORTING_PERIOD_MS 5000

// PulseOximeter is the higher level interface to the sensor

// it offers:

// * beat detection reporting

// * heart rate calculation

// * SpO2 (oxidation level) calculation

PulseOximeter pox;

#endif

uint32_t tsLastReport = 0;

int xPos = 0;

// Callback (registered below) fired when a pulse is detected

void onBeatDetected()

{

Serial.println("Beat!");

heart_beat(&xPos);

}

void setup()

{

Serial.begin(115200);

Serial.println("SSD1306 128x64 OLED TEST");

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally

if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {

Serial.println(F("SSD1306 allocation failed"));

for (;;); // Don't proceed, loop forever

}

// Show initial display buffer contents on the screen --

// the library initializes this with an Adafruit splash screen.

//display.display();

display.clearDisplay();

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(20, 18);

// Display static text

display.print("Pulse OxiMeter");

int temp1 = 0;

int temp2 = 40;

int temp3 = 80;

heart_beat(&temp1);

heart_beat(&temp2);

heart_beat(&temp3);

xPos = 0;

display.display();

delay(2000); // Pause for 2 seconds

display.cp437(true);

display.clearDisplay();

Serial.print("Initializing pulse oximeter..");

#if ENABLE_MAX30100

// Initialize the PulseOximeter instance

// Failures are generally due to an improper I2C wiring, missing power supply

// or wrong target chip

if (!pox.begin()) {

Serial.println("FAILED");

for (;;);

} else {

Serial.println("SUCCESS");

}

// The default current for the IR LED is 50mA and it could be changed

// by uncommenting the following line. Check MAX30100_Registers.h for all the

// available options.

pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);

// Register a callback for the beat detection

pox.setOnBeatDetectedCallback(onBeatDetected);

display_data(0, 0);

#endif

}

void loop()

{

#if ENABLE_MAX30100

// Make sure to call update as fast as possible

pox.update();

int bpm = 0;

int spo2 = 0;

// Asynchronously dump heart rate and oxidation levels to the serial

// For both, a value of 0 means "invalid"

if (millis() - tsLastReport > REPORTING_PERIOD_MS) {

//Serial.print("Heart rate:");

bpm = pox.getHeartRate();

spo2 = pox.getSpO2();

Serial.println(bpm);

//Serial.print("bpm / SpO2:");

Serial.println(spo2);

//Serial.println("%");

tsLastReport = millis();

display_data(bpm, spo2);

}

#endif

drawLine(&xPos);

}

void display_data(int bpm, int spo2) {

display.fillRect(0, 18, 127, 15, BLACK);

//if(bpm ==0 && spo2==0){

// display.setTextSize(1);

// display.setTextColor(WHITE);

//display.setCursor(0, 18);

// Display static text

// display.print("Fingure Out");

//}

display.fillRect(0, 18, 127, 15, BLACK);

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(0, 18);

// Display static text

display.print("BPM ");

display.setTextSize(2);

display.print(bpm);

display.display();

display.setTextSize(1);

display.setTextColor(WHITE);

display.setCursor(64, 18);

// Display static text

display.print("Spo2% ");

display.setTextSize(2);

display.println(spo2);

display.display();

}

void drawLine(int *x_pos) {

// Draw a single pixel in white

display.drawPixel(*x_pos, 8, WHITE);

display.drawPixel((*x_pos)++, 8, WHITE);

display.drawPixel((*x_pos), 8, BLACK); // -----

//Serial.println(*x_pos);

display.fillRect(*x_pos, 0, 31, 16, BLACK);

display.display();

//delay(1);

if (*x_pos >= SCREEN_WIDTH) {

*x_pos = 0;

}

void heart_beat(int *x_pos) {

/************************************************/

//display.clearDisplay();

display.fillRect(*x_pos, 0, 30, 15, BLACK);

// Draw a single pixel in white

display.drawPixel(*x_pos + 0, 8, WHITE);

display.drawPixel(*x_pos + 1, 8, WHITE);

display.drawPixel(*x_pos + 2, 8, WHITE);

display.drawPixel(*x_pos + 3, 8, WHITE);

display.drawPixel(*x_pos + 4, 8, BLACK); // -----

//display.display();

//delay(1);

display.drawPixel(*x_pos + 5, 7, WHITE);

display.drawPixel(*x_pos + 6, 6, WHITE);

display.drawPixel(*x_pos + 7, 7, WHITE); // .~.

//display.display();

//delay(1);

display.drawPixel(*x_pos + 8, 8, WHITE);

display.drawPixel(*x_pos + 9, 8, WHITE); // --

//display.display();

//delay(1);

/******************************************/

display.drawPixel(*x_pos + 10, 8, WHITE);

display.drawPixel(*x_pos + 10, 9, WHITE);

display.drawPixel(*x_pos + 11, 10, WHITE);

display.drawPixel(*x_pos + 11, 11, WHITE);

//display.display();

//delay(1);

/******************************************/

display.drawPixel(*x_pos + 12, 10, WHITE);

display.drawPixel(*x_pos + 12, 9, WHITE);

display.drawPixel(*x_pos + 12, 8, WHITE);

display.drawPixel(*x_pos + 12, 7, WHITE);

//display.display();

//delay(1);

display.drawPixel(*x_pos + 13, 6, WHITE);

display.drawPixel(*x_pos + 13, 5, WHITE);

display.drawPixel(*x_pos + 13, 4, WHITE);

display.drawPixel(*x_pos + 13, 3, WHITE);

//display.display();

//delay(1);

display.drawPixel(*x_pos + 14, 2, WHITE);

display.drawPixel(*x_pos + 14, 1, WHITE);

display.drawPixel(*x_pos + 14, 0, WHITE);

//display.display();

//delay(1);

/******************************************/

display.drawPixel(*x_pos + 15, 0, WHITE);

display.drawPixel(*x_pos + 15, 1, WHITE);

display.drawPixel(*x_pos + 15, 2, WHITE);

display.drawPixel(*x_pos + 15, 3, WHITE);

//display.display();

//delay(1);

display.drawPixel(*x_pos + 15, 4, WHITE);

display.drawPixel(*x_pos + 15, 5, WHITE);

display.drawPixel(*x_pos + 16, 6, WHITE);

display.drawPixel(*x_pos + 16, 7, WHITE);

//display.display();

//delay(1);

display.drawPixel(*x_pos + 16, 8, WHITE);

display.drawPixel(*x_pos + 16, 9, WHITE);

display.drawPixel(*x_pos + 16, 10, WHITE);

display.drawPixel(*x_pos + 16, 11, WHITE);

//display.display();

//delay(1);

display.drawPixel(*x_pos + 17, 12, WHITE);

display.drawPixel(*x_pos + 17, 13, WHITE);

display.drawPixel(*x_pos + 17, 14, WHITE);

display.drawPixel(*x_pos + 17, 15, WHITE);

//display.display();

//delay(1);

display.drawPixel(*x_pos + 18, 15, WHITE);

display.drawPixel(*x_pos + 18, 14, WHITE);

display.drawPixel(*x_pos + 18, 13, WHITE);

display.drawPixel(*x_pos + 18, 12, WHITE);

//display.display();

//delay(1);

display.drawPixel(*x_pos + 19, 11, WHITE);

display.drawPixel(*x_pos + 19, 10, WHITE);

display.drawPixel(*x_pos + 19, 9, WHITE);

display.drawPixel(*x_pos + 19, 8, WHITE);

//display.display();

//delay(1);

/****************************************************/

display.drawPixel(*x_pos + 20, 8, WHITE);

display.drawPixel(*x_pos + 21, 8, WHITE);

//display.display();

//delay(1);

/****************************************************/

display.drawPixel(*x_pos + 22, 7, WHITE);

display.drawPixel(*x_pos + 23, 6, WHITE);

display.drawPixel(*x_pos + 24, 6, WHITE);

display.drawPixel(*x_pos + 25, 7, WHITE);

//display.display();

//delay(1);

/************************************************/

display.drawPixel(*x_pos + 26, 8, WHITE);

display.drawPixel(*x_pos + 27, 8, WHITE);

display.drawPixel(*x_pos + 28, 8, WHITE);

display.drawPixel(*x_pos + 29, 8, WHITE);

display.drawPixel(*x_pos + 30, 8, WHITE); // -----

*x_pos = *x_pos + 30;

display.display();

delay(1);

}

How To Make Pulse Oximeter

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