Cargo Features

Libfancontrold has no features set by default.

[dependencies]
libfancontrold = { version = "0.3.2", features = ["async"] }
async = tokio

Enables async of libmedium

libmedium:

Feature that uses the tokio runtime for asynchronous I/O.

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

tokio async?