heart rate monitor code

Hello everyone, I want to develop this code

https://github.com/Crespo911/android-heart-rate-monitor-1/tree/master/Processing

but this code was developed for Processing 2.0 and is therefore not compatible with Processing 3.0.

Does anyone have a version of this code for Processin 3.0? Or are there codes to read the heartbeat with Android?

Thanks