Pulse oximeter and heart rate sensor. I2C, measures SpO2 and BPM.
| Pin | Name | Function | Type |
|---|---|---|---|
| VIN | VIN | 3.3V–5V power | PWR |
| GND | GND | Ground | GND |
| SCL | SCL | I2C clock | BUS |
| SDA | SDA | I2C data | BUS |
| INT | INT | Interrupt output, active low | I/O |
The MAX30100 is a pulse oximetry and heart-rate sensor that measures SpO2 (blood oxygen) and heart rate using an infrared LED, red LED, and a photodetector. Communicates via I2C and is used in health monitoring wearables.