How to Resolve Contactless Detection Priority Over Chip in POS Systems: Difference between revisions

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  please refer to following steps:
== Issue ==
 
In some instances, POS systems detect a contactless card before a chip card, even when attempting to process a chip transaction. To resolve this, follow the steps below:
# Execute 'emv_set_anti_shake(1)' before opening reader to enable the function;(method readAllCard in FuncActivity.java)
== Step-by-Step Solution ==
# When contact-less card be found, card event 'SMART_CARD_EVENT_CONTALESS_ANTI_SHAKE' will be notified;(cardEventOccured in FuncActivity.java); The callback function will wait 400 ms by default for detecting other readers.
# '''Enable Anti-Shake Function:'''
# Application should check if MSR read in card event callback('case CARD_CONTACTLESS_ANTISHAKE:' in RequestCardActivity.java) and call 'emv_anti_shake_finish' depending on MSR state, this method should also be called If contact card be found('case CARD_INSERT_NOTIFIER:' in RequestCardActivity.java).
#* Before opening the reader, execute ''''emv_set_anti_shake(1)'''' to enable the anti-shake function.
# After card be found, contact-less reader should be restart if contact-less card interaction error('case ERROR_PROCESS_CMD:' in ProcessEMVCardActivity.java).
#* Example: This can be done in the ''''readAllCard'''' method in ''''FuncActivity.java''''.
Step 1-2 should be considered if contact-less restart('case CARD_CONTACTLESS_ANTISHAKE:' in ProcessEMVCardActivity.java).
# '''Handle Contactless Card Found Event:'''
 
#* When a contactless card is detected, the ''''SMART_CARD_EVENT_CONTALESS_ANTI_SHAKE'''' event will be triggered.
While processing contact-less transaction, if contact card inserted, transaction should be interrupted(before reading application finished) and started with contact('case ERROR_CONTACT_DURING_CONTACTLESS:' in ProcessEMVCardActivity.java).
#* The callback function will wait for 400 ms by default to allow for detection of other readers.
 
#* Implementation: This can be observed in ''''cardEventOccured'''' in ''''FuncActivity.java''''.
These steps contain all procedure for handing issue contact-less. Please refer to EMVSample.
# '''Check MSR Read in Callback:'''
#* In the card event callback, specifically ''''case CARD_CONTACTLESS_ANTISHAKE:'''' in ''''RequestCardActivity.java'''', check if MSR is read.
#* Call ''''emv_anti_shake_finish'''' based on the MSR state. This method should also be called if a contact card is found (''''case CARD_INSERT_NOTIFIER:'''' in ''''RequestCardActivity.java'''').
# '''Restart Contactless Reader if Necessary:'''
#* If there’s an interaction error with the contactless card (''''case ERROR_PROCESS_CMD:'''' in ''''ProcessEMVCardActivity.java''''), restart the contactless reader.
#* Consider steps 1 and 2 if contactless is restarted (''''case CARD_CONTACTLESS_ANTISHAKE:'''' in ''''ProcessEMVCardActivity.java'''').
# '''Interrupt Contactless Transaction for Contact Card Insertion:'''
#* During a contactless transaction, if a contact card is inserted, interrupt the transaction before reading the application finishes. Then, restart the transaction with the contact card.
#* See ''''case ERROR_CONTACT_DURING_CONTACTLESS:'''' in ''''ProcessEMVCardActivity.java'''' for implementation details.
'''Note:'''
* These steps encompass the entire procedure for handling the issue of contactless detection taking priority over chip detection.
* For further guidance and example implementations, refer to the EMVSample documentation.

Revision as of 16:05, 16 January 2024

Issue

In some instances, POS systems detect a contactless card before a chip card, even when attempting to process a chip transaction. To resolve this, follow the steps below:

Step-by-Step Solution

  1. Enable Anti-Shake Function:
    • Before opening the reader, execute 'emv_set_anti_shake(1)' to enable the anti-shake function.
    • Example: This can be done in the 'readAllCard' method in 'FuncActivity.java'.
  2. Handle Contactless Card Found Event:
    • When a contactless card is detected, the 'SMART_CARD_EVENT_CONTALESS_ANTI_SHAKE' event will be triggered.
    • The callback function will wait for 400 ms by default to allow for detection of other readers.
    • Implementation: This can be observed in 'cardEventOccured' in 'FuncActivity.java'.
  3. Check MSR Read in Callback:
    • In the card event callback, specifically 'case CARD_CONTACTLESS_ANTISHAKE:' in 'RequestCardActivity.java', check if MSR is read.
    • Call 'emv_anti_shake_finish' based on the MSR state. This method should also be called if a contact card is found ('case CARD_INSERT_NOTIFIER:' in 'RequestCardActivity.java').
  4. Restart Contactless Reader if Necessary:
    • If there’s an interaction error with the contactless card ('case ERROR_PROCESS_CMD:' in 'ProcessEMVCardActivity.java'), restart the contactless reader.
    • Consider steps 1 and 2 if contactless is restarted ('case CARD_CONTACTLESS_ANTISHAKE:' in 'ProcessEMVCardActivity.java').
  5. Interrupt Contactless Transaction for Contact Card Insertion:
    • During a contactless transaction, if a contact card is inserted, interrupt the transaction before reading the application finishes. Then, restart the transaction with the contact card.
    • See 'case ERROR_CONTACT_DURING_CONTACTLESS:' in 'ProcessEMVCardActivity.java' for implementation details.

Note:

  • These steps encompass the entire procedure for handling the issue of contactless detection taking priority over chip detection.
  • For further guidance and example implementations, refer to the EMVSample documentation.
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