MAX30102 Heart Rate & SpO2 Sensor Module

The MAX30102 Heart Rate & SpO₂ Sensor Module is a high-precision optical sensor designed for monitoring heart rate and blood oxygen saturation (SpO₂) in real-time. This compact and reliable module integrates LEDs, photodetector, optics, and low-noise electronics into a single package, making it ideal for wearable health devices, fitness trackers, medical prototypes, and IoT health monitoring applications.

Using I²C communication, the module can be easily connected to microcontrollers like Arduino Uno, ESP32, and Raspberry Pi. The MAX30102 module is capable of accurate, real-time measurements, even for small or low-power embedded systems.

Key Features

• Measures heart rate (BPM) and blood oxygen saturation (SpO₂)

• Integrated LEDs and photodetector for precise optical measurement

• High sensitivity and low-noise signal detection

• I²C communication interface for easy microcontroller integration

• Compact, lightweight module suitable for wearables and health projects

• Low power consumption ideal for battery-powered applications

Specifications

• Sensor IC: MAX30102

• Interface: I²C (SDA & SCL)

• Operating Voltage: 1.8V – 3.3V (logic level), 3.3V – 5V for module power

• LED Wavelengths: Red ~660 nm, IR ~880 nm

• Measurement Range: Heart rate and SpO₂ (0–100%)

• Sampling Rate: Configurable via software

• Dimensions: Small, compact PCB module (approx. 20 mm × 22 mm)

Pin Description

• VIN / VCC: Module power supply (3.3V–5V)

• GND: Ground

• SDA: I²C data line

• SCL: I²C clock line

• INT: Interrupt output for data ready (optional)