It's based on the ATmega 328 version: https://github.com/TheDIYGuy999/Rc_Engine_Sound and on bitlunis Halloween example: https://github.com/bitluni/MotionPumpkin ...
This is a breadboard friendly breakout board for the Maxim MAX30105 reflectance, particle, and pulse ox sensor. This library should work with other MAX3010x sensors including the MAX30102, MAX30101, ...