Improved serial debugging, with debug levels and simple software debugger, to see/change global variables, add watch, or call a function.

Easy to use interrupting thread handler. Does not relay on yield() or delay(ms) for switching and no pre-allocated stack needed.

Have you ever wished for "Arduino app?" A kind of pre-compiled binary file that you may copy to SD card and deploy on multiple boards.

Connect the Arduino MKR ENV shield with a Raspberry Pi and use the shield under Python.