The MAX30102 Heart Rate and Pulse Oximeter Sensor Module (Black) is a compact, high-accuracy optical biosensing module designed to measure heart rate (HR) and blood oxygen saturation (SpO₂). It integrates red and infrared LEDs, a photodetector, and advanced signal processing in a single package. This module is widely used in wearable devices, health monitoring systems, fitness trackers, and DIY biomedical projects due to its reliability, low power consumption, and easy I²C interface.
Core Sensor Specifications
• Sensor Type: Optical heart rate and SpO₂ sensor
• Sensor IC: MAX30102
• Measurement Parameters: Heart rate (PPG), blood oxygen saturation (SpO₂)
• Optical System: Red LED (660 nm) + IR LED (880 nm)
Electrical & Interface
• Operating Voltage: 1.8 V (core), 3.3 V–5 V (module level)
• Communication Interface: I²C
• I²C Address: 0x57
• Interface Pins: VCC, GND, SDA, SCL, INT
• Power Consumption: Ultra-low, optimized for wearables
Performance Characteristics
• High sensitivity photodetector with ambient light rejection
• Programmable sample rate and LED current
• Fast response suitable for real-time monitoring
• Stable readings with proper finger placement
Physical Characteristics
• Module Type: PCB-mounted biosensor module
• Color Variant: Black PCB
• Compact and lightweight design
• Optimized for fingertip and reflective measurements
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• Raspberry Pi
• Wearable and portable health devices
• IoT-based health monitoring systems
Key Advantages
• Simultaneous heart rate and SpO₂ measurement
• Low power operation for battery devices
• Simple I²C connectivity
• Widely supported libraries and examples
Technical Insights
• Requires proper averaging and filtering in software
• SpO₂ accuracy depends on calibration and placement
• Works best with steady contact and minimal motion
• Interrupt pin helps reduce MCU polling
Applications
• Fitness trackers and smart bands
• Pulse oximeters
• Remote patient monitoring
• Sleep and wellness tracking
• DIY biomedical and research projects
Pro Tip
• Use rubber housing or clip for consistent pressure
• Average multiple samples for stable readings
• Reduce LED current to save power
• Avoid strong ambient light exposure
Package Includes
• 1 × MAX30102 Heart Rate and Pulse Oximeter Sensor Module (Black)