The MAX30102 is integrated pulse oximetry and heart-rate monitor biosensor module based on PPG ((PhotoPlethysmoGraphy). It is so small that you can just wear it on your finger or wrist for data collecting. Internally integrated 18bit ADC, the sensor supports I2C data output, which could be compatible with most controllers.
1.Try to fix the sensor on your finger in using to avoid the effect of pressure change on data output.
2.This product is not a professional medical device, and should not be used as an auxiliary accessory in medical diagnosis and treatment.