Magtek USB MagnePrint Swipe Reader with Encryption Manual do Utilizador descarregar pdf (Página 49)

Section 4. USB Communications

DEVICE_SERIAL_NUM PROPERTY

Property ID: 32 (0x20)

Property Type: String

Length: 0 – 15 bytes

Get Property: Yes

Set Property: Yes

Default Value: The default value is no string with a length of zero.

Description: The value is an ASCII string that represents the device serial number. This

string can be 0 – 15 bytes long. The value of this property, if any, will be sent

to the host in the device serial number field of the USB input report when a

card is swiped. This is explained in the card data section of this document.

This property is stored in non-volatile memory, so it will persist when the unit

is power cycled. When this property is changed, the unit must be reset (see

Command Number 2) or power cycled to have these changes take effect. This

device must be unplugged for at least 30 seconds to properly power cycle it.

Example Set DEVICE_SERIAL_NUM property Request (Hex):

Cmd Num Data Len Prp ID Prp Value

01 04 20 31 32 33

Example Set DEVICE_SERIAL_NUM property Response (Hex):

Result Code Data Len Data

00 00

Example Get DEVICE_SERIAL_NUM property Request (Hex):

Cmd Num Data Len Prp ID

00 01 20

Example Get DEVICE_SERIAL_NUM property Response (Hex):

Result Code Data Len Prp Value

00 03 31 32 33

SEQUENCE_COUNTER PROPERTY

Property ID: 33 (0x21)

Property Type: Double Word

Length: 4 bytes

Get Property: Yes

Set Property: No

Default Value: 0

Description: This 4 byte field contains the sequence counter. The sequence counter is in

little endian byte order. Byte 1 is the least significant byte. The sequence

counter is incremented by one every time a card is swiped. The sequence

number can not be reset.

This property is stored in non-volatile memory, so it will persist when the unit

is power cycled.

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Magtek USB MagnePrint Swipe Reader with Encryption Manual do Utilizador Página 49