Cargo Features

[dependencies]
apdu-core = { version = "0.4.0", default-features = false, features = ["std", "longer_payloads"] }
default = std

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

std default
longer_payloads

This crate also supports 16 bit length payloads.
However longer payloads are not tested well, so we are enabling it only if this feature is turned on.