Note that the main target of micropython-lib is a "Unix" port of the aforementioned fork of MicroPython. Actual system requirements vary per module. Majority of modules are compatible with the upstream MicroPython, though some may require additional functionality/optimizations present in the "advanced" fork. Modules not related to I/O may also work without problems on bare-metal ports, not just on "Unix" port (e.g. pyboard). micropython-lib packages are published on PyPI (Python Package Index), the standard Python community package repository: http://pypi.python.org/ . On PyPI, you can search for MicroPython related packages and read additional package information. By convention, all micropython-lib package names are prefixed with "micropython-" (the reverse is not true - some package starting with "micropython-" aren't part of micropython-lib and were released by 3rd parties).