MAX30102 Heart-Rate/Oximeter Sensor
Optical heart-rate and blood-oxygen sensor module using the MAX30102 over I2C, for wearables and health-monitoring prototypes, not medical use.
The MAX30102 integrates red and infrared LEDs, a photodetector and a low-noise signal chain in one package, measuring pulse and blood-oxygen saturation (SpO2) from light reflected through a fingertip or wrist. It communicates over I2C, includes an on-chip FIFO for buffering samples and an interrupt pin, and is supported by widely used Arduino and ESP32 libraries. The sensor core runs at 1.8 V with the LEDs on a separate supply, and breakout boards carry the regulators needed, but check your board's I2C logic level before connecting it to a 5 V microcontroller. It is intended for learning, wearables and prototypes and is not a certified medical device.
Specifications
- Operating Voltage
- 3.3–5 V module supply (1.8 V sensor core)
- Main IC
- Maxim MAX30102
- Interface / Output
- I2C (address 0x57) + interrupt pin
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