Heart Rate click carries Maxim’s MAX30100 integrated pulse oximetry and heart-rate sensor.
Developers of end-user applications should note that the readings can be negatively impacted by excess motion and changes in temperature.
Also, too much pressure can constrict capillary blood flow and therefore diminish the reliability of the data. A programmable INT pin is also available to use.

Specification:
3.3V power supply.
Optical sensor: IR and red LED combined with photodetector
Measures absorbance of pulsing blood
I2C interface plus INT pin
3.3V power supply

Key Benefits:
Motion artefact resillence
Ambient light cancellation
Ready-to-use examples save development time