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

Number of dependers MFRC522 version Downloads/month
0 0.8.0 39
1 0.6.1 26
1 0.3.1 2
1 0.2.0 36
Depender (with downloads and own rev deps) MFRC522 version
3.1K 33 stm32f1xx-hal dev ^0.3.0
380 py32f0xx-hal dev ^0.6.1
2 stm32f1xx-hal-bxcan dev ^0.2.0