2 (or more) PN532 modules. compare correcr cards on correct reader

[byronas]

I get :

UID Value 0 : 0x43 0xFC 0x6B 0xA9
0 3 3 19 : 43 FC 6B A9
UID Value 1 : 0xA2 0x1E 0x3D 0x51
1E 0 0 0 : A2 1E 3D 51