AITRIP 3PCS Heart Rate Sensor Module MAX30102 Puls Detection Blood Oxygen Concentration for Arduino STM32

Interface: VIN: Main power input 1.8V-5V. 3-bit pad: I2C bus pull up level, you can choose 1.8V or 3.3V according to the pin master voltage. SCL: I2C bus clock SDA: Connected to the I2C bus data INT: MAX30102 chip interrupt pin RD: MAX30102 chip's RD LED grounding terminal, generally doesn't need to connect. IRD: MAX30102 chip's IR LED grounding terminal, generally doesn't need to connect. GND: grounding wire. 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 Package Including: 3pcs Heart-Rate Sensor Module, MAX30102 Blood Oxygen Sensor, Compatible with Arduino STM32