MagTek USB MagnePrint Swipe Reader with Encryption - Manual (Page 49)

Section 4. USB Communications
41
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.