Specification:
LED peak wavelength:660nm/880nm.
LED power supply voltage:3.3~5V.
Detection Signal Type:Optical Reflection Signal (PPG).

Output Signal Interface: I2C Interface.
Communication Interface Voltage:1.8~3.3V~5V
Reserve Mounting Hole Size:0.5x8.5mm/0.02x0.33Inches.

Interface:
VIN:Main power input 1.8V-5V

3-bit pad:
I2C bus pull up level,
(1.8V or 3.3V can be chosen according to the pin master voltage)

SCL:I2C bus clock
SDA:Connects the I2C bus data

INT:MAX30102 chip,interrupt pin
RD:MAX30102 chip,RD LED grounding terminal,(generally no need to connect)
IRD:MAX30102 chip,IR LED grounding terminal,(generally no need to connect)

GND: grounding wire

Package includes:
4pcs x MAX30102 Heart Rate Sensor Module