Pulse oximeter-heart rate sensor
Blood Oxygen Concentration Sensor
heart rate monitor
biosensor module
photodetector
LED Peak Wavelength: 660nm/880nm
LED Power Supply Voltage: 3.3 – 5V
Detection Signal Type: Light Reflection Signal (PPG)
Output Signal Interface: I2C interface

PINOUT DIAGRAM-
VIN: Main power input terminal 1.8 – 5V
3-bit pad: Select the pull-up level of the bus, depending on the pin master voltage, select 1.8V or 3.3V
SCL: The clock connected to the I2C bus
SDA: Data connected to the I2C bus
INT: Interrupt pin of the MAX30102 chip
RD: RED LED ground terminal of MAX30102 chip, generally not connected
IRD: The IR LED ground of the MAX30102 chip is generally not connected
GND: Ground wire