Cargo Features

rust-mqtt = { version = "0.3.0", default-features = false, features = ["no_std", "std", "tls"] }
default = std

The std feature is set by default whenever rust-mqtt is added without default-features = false somewhere in the dependency tree.

no_std = defmt
std default = log

Enables std of embedded-io


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.

defmt no_std?
log std