Sometimes bad data was passed back in .value, especially when using newer versions of the BM1000. Also, stale data was returned when sampling infrequently. Now, get the latest values when accessing .value.

Thanks to adafruitguy in the Adafruit Forums for discovering the issue.

To use in CircuitPython, simply install the Adafruit CircuitPython bundle.

To use in CPython, pip3 install adafruit-circuitpython-ble-berrymed-pulse-oximeter.

Read the docs for info on how to use it.