RW420 - Smart Card Reader Protocol



I need to change the protocol to T1 in the smart card reader of printer.

Is it possible to change the protocol from T0 to T1?


I am trying to do it the following way :


Command PPS :

byte[] PST_SELECT_PROTOCOL = { (byte)0xFF, (byte)0x01 , (byte)0xFE };

Response of printer : 1521 where 21 is Too short APDU


can anybody help me? , by the way i'm working Android application.


Thank you!