Ultralight command group
With this command group, you can access MIFARE Ultralight cards in low-level mode. To work with this command group, a card has to be in ISO 14443-3 Type A selected state. This can be achieved using the Iso14a command group.
WARNING: This command set is not available in all Baltech reader firmware variants.
Status codes
| BRP status | BRP Library Error Code | Mnemonic | Description |
|---|---|---|---|
| 0x01 | 0x2501 (9473) | Ultralight.ErrNoTag | There's no card in the HF field, or the card doesn't respond. |
| 0x02 | 0x2502 (9474) | Ultralight.ErrAuth | Authentication with the card has failed. |
| 0x03 | 0x2503 (9475) | Ultralight.ErrHf | The response frame is invalid, e.g. it may contain an invalid number of bits or an invalid CRC checksum. Please rerun the command. |
| 0x04 | 0x2504 (9476) | Ultralight.ErrKey | The encryption key is undefined or inaccessible. |
| 0x05 | 0x2505 (9477) | Ultralight.ErrNack | The card didn't accept the command. Please check the conditions and rerun the command. |
| 0x18 | 0x2518 (9496) | Ultralight.ErrInterface | Communication with the reader chip has failed. Please reset the reader with Sys.Reset and check the reader chip status with Sys.GetBootStatus. |
| 0x19 | 0x2519 (9497) | Ultralight.ErrCmd | The specified command or parameters are unknown. |
| 0x20 | 0x2520 (9504) | Ultralight.ErrHwNotSupported | This command isn't supported by the reader hardware. |
| 0x21 | 0x2521 (9505) | Ultralight.ErrFirmwareNotSupported | This command isn't supported by the reader firmware. |
| 0x28 | 0x2528 (9512) | Ultralight.BreakErr |
The command has been aborted because the HF
interface has been requested by another task or
command. Please reselect the card.
This error only occurs when you combine VHL and low-level commands. We highly recommend you avoid that combination as these 2 command sets will interfere with each other's card states. |