CircuitPython library for the Piper Heart Rate (Pulse) Sensor module
The original Piper Heart Rate Sensor was module based on the Partron PPSI262 integrated photoplethysmography LED/Photodiode module. Newer versions, and almost all sensors sold are based on an ATTINY uC acting as a i2c peripheral and controlling a set of LEDs and a sensitive phototransistor. The latest version of this library is no longer compatible with the original PPSI262 sesnsor.
This library depends on the CircuitPython busio (i2c) and CircutPython ulab (numpy) libraries, and is connected via i2c.