MAX30102 Heart Rate Pulse Oximeter Sensor Module – Blood Oxygen SpO2 & PPG Sensor

The MAX30102 Sensor Module is designed for optical heart-rate and SpO2 sensing applications. The sensor contains red and infrared LEDs together with a photodetector and supporting circuitry. When placed appropriately against a finger, earlobe, or other suitable measurement location, the sensor can capture PPG signals for processing by a connected microcontroller.

The module's I2C communication interface simplifies connection to popular development platforms. Heart-rate and SpO2 algorithms can be implemented using suitable libraries and application software, allowing developers to display readings on an OLED/LCD, save data, transmit measurements wirelessly, or integrate them into an IoT monitoring system.

Because different breakout boards can use different regulators, pull-ups, and voltage-level circuitry, users should check the actual module markings before applying power. Do not assume that every MAX30102 breakout has identical power circuitry.

Features

• MAX30102 optical heart-rate and SpO2 sensor.
• Integrated red and infrared LEDs.
• Red LED wavelength: 660nm.
• Infrared LED wavelength: 880nm.
• Photoplethysmography (PPG) signal detection.
• Ambient-light cancellation circuitry.
• I2C digital communication interface.
• INT interrupt output.
• Low-power operating modes.
• Compact PCB design.
• Suitable for Arduino, ESP32, Raspberry Pi, and other microcontrollers.
• Useful for wearable and biometric monitoring prototypes.
• Suitable for educational and IoT development.

Applications

• Heart-rate monitoring prototypes.
• Blood oxygen/SpO2 monitoring projects.
• Wearable electronics.
• Fitness-monitoring prototypes.
• Smartwatch and fitness-band development.
• Arduino and ESP32 health projects.
• IoT health-monitoring systems.
• Biomedical electronics education.
• PPG signal-processing experiments.
• Finger or earlobe optical sensing projects.
• Embedded biometric monitoring systems.

How to Use

1. Connect VIN to a compatible power supply according to the specific breakout board.
2. Connect GND to the microcontroller ground.
3. Connect SCL to the controller's I2C clock pin.
4. Connect SDA to the controller's I2C data pin.
5. Connect INT if your application requires sensor interrupt functionality.
6. Install a suitable MAX30102 library or sensor driver.
7. Initialize the I2C interface and configure the sensor through software.
8. Place a finger or another suitable measurement area steadily over the sensor.
9. Allow the sensor to acquire a stable PPG signal.
10. Process the collected data to calculate and display heart-rate and SpO2 values.

Important Notes

• The MAX30102 module is intended primarily for development, prototyping, education, and non-clinical monitoring.
• It is not a certified medical diagnostic device.
• Readings can be affected by movement, finger placement, skin contact, ambient light, temperature, and software algorithms.
• Do not rely on this module alone for medical decisions.
• Verify the actual breakout-board voltage requirements before powering it.
• Some MAX30102 boards include voltage regulation and I2C level-shifting circuitry, while board designs can vary.
• Use correct I2C logic levels for the connected microcontroller.
• Keep the sensor surface clean for more consistent optical measurements.
• Hold the measurement area steady during sampling to reduce motion artifacts.
• Product PCB layout, components, color, and physical appearance may vary depending on stock.
• Please allow approximately 5% measuring deviation due to manual measurement.

Package Includes

• 1 × MAX30102 Heart Rate and Pulse Oximeter Sensor Module