MAX30102 Heart Rate & SpO2 Pulse Oximeter Sensor Module for Arduino & ESP32

MAX30102 Heart Rate and SpO2 Pulse Oximeter Sensor Module

Buy the MAX30102 Heart Rate and SpO2 Sensor Module online in Pakistan from Robostan.pk. This compact optical biosensor module is designed for Arduino, ESP32, Raspberry Pi, wearable electronics, fitness monitoring prototypes, and educational biomedical electronics projects.

The MAX30102 Pulse Oximeter Sensor integrates red and infrared LEDs, a photodetector, optical components, and low-noise signal processing electronics. It uses reflective photoplethysmography (PPG) to detect changes in reflected light associated with blood volume variations.

When paired with a suitable microcontroller and signal-processing software, the sensor can support experimental heart rate (BPM) monitoring and blood oxygen saturation (SpO2) estimation.

The module communicates through an I2C digital interface and is suitable for compact, low-power electronics development projects.

Key Features

• MAX30102 optical heart rate and pulse oximeter sensor
• Supports experimental heart rate (BPM) measurement
• Supports SpO2 estimation with suitable software algorithms
• Integrated red and infrared LEDs
• Built-in photodetector and optical components
• Reflective photoplethysmography (PPG) sensing
• Digital I2C communication interface
• Standard 7-bit I2C address: 0x57
• Programmable LED current and sampling rate
• Integrated ambient light cancellation circuitry
• High-resolution optical signal acquisition
• Internal sample FIFO buffer
• Low-power operation and software shutdown support
• Compact design for wearable electronics prototypes
• Compatible with Arduino and ESP32 using suitable interfacing
• Can be used with Raspberry Pi I2C projects

Technical Specifications

Note: The specifications above describe the MAX30102 sensor IC and its general functionality. Breakout board power inputs, connector labels, voltage regulators and logic-level compatibility vary between manufacturers.

Applications

• Arduino heart rate monitoring experiments
• ESP32 wearable electronics projects
• Educational pulse oximetry demonstrations
• Optical pulse waveform acquisition
• Fitness electronics prototypes
• Raspberry Pi biomedical sensor projects
• IoT sensor data collection experiments
• PPG signal processing research
• Wearable technology development
• Electronics and biomedical engineering education
• Digital sensor interfacing experiments

How Does the MAX30102 Sensor Work?

The MAX30102 measures variations in reflected light using an optical sensing technique known as photoplethysmography (PPG).

The sensor directs red and infrared light toward the skin. A photodetector measures the light reflected back into the sensor.

Small changes in blood volume during each heartbeat affect the reflected light signal. Suitable software processes these variations to estimate the pulse rate.

Red and infrared signals may also be processed together using a suitable pulse oximetry algorithm to estimate peripheral blood oxygen saturation, commonly known as SpO2.

Important: The MAX30102 provides optical sensor data. Reliable BPM and SpO2 estimates require appropriate signal processing, calibration, optical contact and testing. The sensor does not independently guarantee medical-grade readings.

MAX30102 I2C Interface

The MAX30102 communicates with a microcontroller through a standard I2C interface.

The main connections on commonly sold breakout boards include:

• VIN / VCC: Module power input; verify the actual board rating
• GND: Ground connection
• SDA: I2C data line
• SCL: I2C clock line
• INT: Optional interrupt output on supported modules

Some breakout boards expose additional pins such as RD and IRD. These are not required for basic I2C communication and should be left unconnected unless the specific module documentation instructs otherwise.

I2C Address: 0x57 (7-bit).

Arduino Compatibility

The MAX30102 Heart Rate Sensor can be integrated with Arduino UNO, Nano, Mega and other compatible microcontrollers.

A typical Arduino UNO I2C signal connection uses:

• MAX30102 SDA: Arduino A4
• MAX30102 SCL: Arduino A5
• MAX30102 GND: Arduino GND
• MAX30102 Power: According to the breakout board's verified supply rating

Check I2C voltage compatibility before connection. Some MAX30102 breakout boards do not include complete 5V logic-level conversion, even when they include voltage regulators.

Compatible Arduino software libraries can acquire red and infrared samples, display optical pulse waveforms and implement experimental heart rate or SpO2 estimation algorithms.

ESP32 Compatibility

The MAX30102 can be used with ESP32 microcontrollers through an appropriate I2C connection.

Common ESP32 development board examples use GPIO21 for SDA and GPIO22 for SCL, although pin assignments are configurable and vary by board.

Use a suitable power supply and verify the sensor board's I2C pull-up voltage before making connections.

The ESP32 can acquire optical samples and send processed data to displays, serial monitors or suitable IoT applications.

Raspberry Pi Compatibility

The MAX30102 is also suitable for Raspberry Pi projects using the I2C interface.

On standard Raspberry Pi GPIO headers, common I2C connections include GPIO2 (SDA) and GPIO3 (SCL).

Because Raspberry Pi GPIO operates at 3.3V logic, ensure that the breakout board's signal levels and power connections are compatible.

MAX30102 vs MAX30100

The MAX30102 and MAX30100 are related optical biosensors used in pulse and blood oxygen estimation projects.

• MAX30102: Integrated optical sensor with red and infrared LEDs, programmable acquisition settings and improved signal processing features.
• MAX30100: An older pulse oximeter and heart rate sensor design.

The two sensors are not interchangeable in every circuit or software library. Check the device model and driver compatibility before use.

Tips for Obtaining Stable Readings

• Keep the sensing surface clean.
• Position a fingertip steadily over the optical sensor for demonstration projects.
• Avoid excessive finger pressure.
• Reduce direct ambient light entering the sensor.
• Minimize movement while acquiring readings.
• Allow suitable time for the software algorithm to collect samples.
• Adjust sampling settings and LED current according to the application.
• Use proper power supply decoupling and I2C connections.

Important Safety and Usage Notes

• This is an electronics development module, not a certified medical device.
• Do not use it to diagnose, monitor or treat medical conditions.
• Do not rely on its SpO2 or heart rate estimates during medical emergencies.
• Sensor readings can be affected by movement, placement, ambient light and software algorithms.
• Accurate SpO2 estimation requires suitable algorithms and validation.
• Verify breakout board supply voltage before connecting 3.3V or 5V power.
• The bare MAX30102 IC requires different internal supply rails from many complete breakout boards.
• Check I2C logic-level compatibility when connecting to 5V Arduino boards.
• Do not connect the module directly to AC mains or high-voltage circuits.
• Avoid mechanical pressure or damage to the optical sensing window.

Package Contents

• 1 x MAX30102 Heart Rate and Pulse Oximeter Sensor Module

Arduino, ESP32, Raspberry Pi, connecting wires and displays are not included unless specified separately.

Buy MAX30102 Heart Rate Sensor in Pakistan

Looking for a MAX30102 Heart Rate and SpO2 Pulse Oximeter Sensor Module in Pakistan? Shop online at Robostan.pk for Arduino sensors, ESP32 development boards, Raspberry Pi accessories, optical biosensors, robotics components and DIY electronics supplies.

The MAX30102 is suitable for students, engineers, electronics enthusiasts and developers working on optical sensing and wearable technology prototypes.

Order your MAX30102 Sensor Module from Robostan.pk with nationwide delivery across Pakistan, including Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar and other cities.

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