It's used only as a dev dependency in 3 crates.

Number of dependers MFRC522 version Downloads/month
0 0.8.0 0
0 0.7.0 44
1 0.6.1 0
1 0.3.1 0
1 0.2.0 19
Depender (with downloads and own rev deps) MFRC522 version
1.1K 32 stm32f1xx-hal dev ^0.3.0
2 stm32f1xx-hal-bxcan dev ^0.2.0
py32f0xx-hal dev ^0.6.1