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BALTECH Docs |
C API for BALTECH SDK
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BALTECH Docs |
C API for BALTECH SDK
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| brp_errcode brp_VHL_IsSelected | ( | brp_protocol | protocol | ) |
This command checks if the card/label selected by the last execution of the VHL.Select command is still in the HF field of the antenna. If the card/label has been taken away from the reader and put back on it after the last execution of VHL.Select, or if VHL.Select has not been called after a card has been put on the reader, this command will return the VHL.ErrCardNotSelected status code.
For 125 kHz cards, a retry is automatically performed in case of a misread to improve reliability. Please note that this may increase reaction time for 125 kHz cards to a maximum of 100 ms.
| [in] | protocol | used to execute the command |