MAX30100 Pulse Oximeter Heart Rate Sensor Module

MAX30100 Pulse Oximeter Heart Rate Sensor Module Documentation

Overview

The MAX30100 is a pulse oximeter and heart rate sensor module that measures oxygen saturation (SpO2) and heart rate (HR) in real-time. This module is based on the MAX30100 IC from Maxim Integrated, which integrates two LEDs, photodetectors, and analog-to-digital converters to measure the absorption of light by oxygenated and deoxygenated hemoglobin in blood.

Pinout

The MAX30100 module typically has the following pinout:

| Pin | Function |
| --- | --- |
| VCC | Power supply (3.3V - 5V) |
| GND | Ground |
| SCL | I2C Clock |
| SDA | I2C Data |
| INT | Interrupt (optional) |

Communication Protocol

The MAX30100 module communicates via I2C protocol, with a default address of 0x57.

Software Libraries and Examples

Arduino Example

To use the MAX30100 module with an Arduino board, you can use the `MAX30100` library. Here's an example code snippet:
```c
#include <Wire.h>
#include <MAX30100.h>

MAX30100 sensor;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  sensor.begin();
}

void loop() {
  sensor.update();
  Serial.print("Heart Rate: ");
  Serial.print(sensor.getHeartRate());
  Serial.print(" bpm, SpO2: ");
  Serial.print(sensor.getSpO2());
  Serial.println(" %");
  delay(1000);
}
```
Raspberry Pi (Python) Example

To use the MAX30100 module with a Raspberry Pi board, you can use the `smbus` and `time` libraries. Here's an example code snippet:
```python
import smbus
import time

# I2C bus and address
bus = smbus.SMBus(1)
address = 0x57

while True:
    # Read heart rate and SpO2 data
    data = bus.read_i2c_block_data(address, 0x00, 4)
    heart_rate = (data[0] << 8) + data[1]
    spo2 = (data[2] << 8) + data[3]

print("Heart Rate: {} bpm, SpO2: {} %".format(heart_rate, spo2))
    time.sleep(1)
```
 ESP32 (MicroPython) Example

To use the MAX30100 module with an ESP32 board, you can use the `machine` and `i2c` libraries. Here's an example code snippet:
```python
import machine
import i2c

# I2C bus and address
i2c_bus = i2c.I2C(scl=machine.Pin(22), sda=machine.Pin(21))
address = 0x57

while True:
    # Read heart rate and SpO2 data
    data = i2c_bus.readfrom_mem(address, 0x00, 4)
    heart_rate = (data[0] << 8) + data[1]
    spo2 = (data[2] << 8) + data[3]

print("Heart Rate: {} bpm, SpO2: {} %".format(heart_rate, spo2))
    time.sleep(1)
```
Note: In all examples, you need to connect the MAX30100 module to the I2C bus of your microcontroller board and ensure the correct pin connections.

Important

The MAX30100 module requires a stable power supply and proper grounding to function accurately.
 Ensure that the module is connected to a reliable power source and that the I2C bus is properly configured.
 The module may require calibration for accurate readings; refer to the datasheet for calibration procedures.

By following this documentation and examples, you can successfully integrate the MAX30100 Pulse Oximeter Heart Rate Sensor Module into your IoT projects for accurate and reliable heart rate and SpO2 measurements.