MAX30102 pulse oximeter – Heart Rate Sensor, Black COM43

Description

The MAX30102 is an integrated pulse oximetry and heart-rate monitor module. It includes internal LEDs, photodetectors, optical elements, and low-noise electronics with ambient light rejection. The MAX30102 provides a complete system solution to ease the design-in process for mobile and wearable devices. Communication is through a standard I2C-compatible interface. The module can be shut down through software with zero standby current, allowing the power rails to remain powered at all times.

Specifications

• Form color : Black
• Operating  Voltage: 3.3v – 5v(Recommended to use 3.3v).

Applications

• Wearables
• Heart-rate monitor
• Pulse oximeter

Hardware required:

• MAX30102 Sensor
• Arduino UNO
• Breadboard
• Jumper wires

Interfacing MAX30102 pulse oximeter with Arduino

• If you’re facing issues with communication (especially SDA/SCL lines) or power supply consumption , Cut the trace in the place of the red line. This will disconnect all 4.7kΩ pull-up resistors from the 1.8V supply voltage.
• Now make a jumper as shown by the yellow line with a piece of wire or a solder blob. This will pull all the 4.7kΩ resistors up to 3.3V.

 

 

Setting up the Arduino IDE

1. Download and Install the Arduino IDE
2. Go to Tools > Board > Board Manager 
3. Type Arduino AVR Board and Click Install, Also install ESP8266 board when using nodemcu ESP8266 module  in your Arduino IDE.
4. If boards are not in the Board Manager, Go to file > Preferences 
5. Enter   http://arduino.esp8266.com/stable/package_esp8266com_index.json  (For ESP8266 module), https://github.com/dmadison/ArduinoXInput_AVR.git (For Arduino) , press OK
6. Repeat step 3 to install the board.

Installing the Library

1. Go to , Tools > Manage Libraries
2. Type “MAX30102″ and  install the one by SparkFun Electronics or dowonload it  here

See how to install library  here

 

 

Upload the sample Sketch

#include <Wire.h>
#include “Adafruit_MAX30102.h”

Adafruit_MAX30102 sensor;

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

if (!sensor.begin()) {
Serial.println(“MAX30102 not found!”);
while (1);
}

Serial.println(“MAX30102 initialized.”);
}

void loop() {
int IR, red;

if (sensor.check()) {
IR = sensor.getIR();
red = sensor.getRed();
Serial.print(“IR: “); Serial.print(IR);
Serial.print(” Red: “); Serial.println(red);

Serial.print(“Mean Diff: “);
Serial.println(meanDiff(IR));
}

delay(10);
}

long meanDiff(int M) {
#define LM_SIZE 15
static int LM[LM_SIZE];
static byte index = 0;
static long sum = 0;
static byte count = 0;
long avg = 0;

sum -= LM[index];
LM[index] = M;
sum += LM[index];
index = (index + 1) % LM_SIZE;
if (count < LM_SIZE) count++;

avg = sum / count;
return avg – M;
}