Fails to build when used in a esp32 project with feature "std"

[JohnTheCoolingFan]

Cargo project generated using template from https://github.com/esp-rs/esp-idf-template Added pn532 = { version = "0.2", features = ["std"] } to dependencies. Full error log: https://gist.github.com/JohnTheCoolingFan/ca330da3b7e187e28124d98f0573abba

[dimpolo]

Thanks for the report!

The std feature pulls in the serialport crate, which only compiles for some targets.

Currently that is all that the std feature does, so there is no reason to enable it for the esp32. I'll try and document this better 😃

[JohnTheCoolingFan]

Alright, thanks for clarifying

[dimpolo]

should be documented now