It's used only as a dev dependency in 6 crates.

Depender (with downloads and own rev deps) esp-hal-smartled version
1.2K 1 esp32c3-hal dev ^0.8.0
1.0K 3 esp32-hal dev ^0.8.0
900 esp32s3-hal dev ^0.8.0
750 esp32s2-hal dev ^0.8.0
650 esp32c6-hal dev ^0.8.0
200 esp32h2-hal dev ^0.8.0