Cargo Features

[dependencies]
esp_idf_logger = { version = "0.1.1", default-features = false, features = ["ets_printf"] }
default = ets_printf

The ets_printf feature is set by default whenever esp_idf_logger is added without default-features = false somewhere in the dependency tree.

ets_printf default

esp_idf_logger has 2 features without comments.