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ACR122U

JavaCard Applet Development Related Questions and Answers.
Shine
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ACR122U

Postby Shine » Thu Mar 08, 2018 12:06 am

Hi, i'm beginner in smartcard development,
i'm using contactless reader ACR122U and dual interface card JCOP 31 2.4.1.
when i tried to connect the card with pyApdutool the ATR just return value 3b 00,
and when i tried to get the UID of the card, it was return error value.
a1.PNG

a2.PNG

could someone give me explanation about this?
and another question, did acr122u need nfclib to work under windows environtment?
Thanks for your help.
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bigWhite
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Re: ACR122U

Postby bigWhite » Thu Mar 08, 2018 10:08 pm

Get the UID of the card need to have relevant permissions,
In addition, there need internal and external authentication before getting the card UID, maybe you can contact the card issuer.

Shine
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Re: ACR122U

Postby Shine » Thu Mar 08, 2018 10:19 pm

thanks for your answer,
but my really question, how to make sure that the card has connected to the reader?,
because i have tried another command but the return is error value too.

bigWhite
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Re: ACR122U

Postby bigWhite » Sun Mar 11, 2018 10:05 pm

Shine wrote:thanks for your answer,
but my really question, how to make sure that the card has connected to the reader?,
because i have tried another command but the return is error value too.


how to make sure that the card has connected to the reader?
If you connected failed, you will not able to send APDUs, and the pyApdutool will prompt "Not connect yet." .
Generally, the reader returns ATR information, it means the connection is successful

Shine
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Re: ACR122U

Postby Shine » Mon Mar 12, 2018 10:19 am

bigWhite wrote:how to make sure that the card has connected to the reader?
If you connected failed, you will not able to send APDUs, and the pyApdutool will prompt "Not connect yet." .
Generally, the reader returns ATR information, it means the connection is successful


when i try to connect the card (JCOP31) with the reader (acr122u (a1sr-102)), the atr isnt detected. is there any configuration or command to make the reader start to polling the card? by the way, i'm using windows 10.


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