Cargo Features

[dependencies]
esp8266-at-driver = { version = "0.4.0", default-features = false, features = ["std"] }
default = std

The std feature is set by default whenever esp8266-at-driver is added without default-features = false somewhere in the dependency tree.

std default

Enables std of embassy-time ^0.1.0

esp8266-at-driver has 2 features without comments.