FingerVein Integration Module (VIM)
Installation and Programming Manual
Page
21 of 48
To speed up data transmission to the serial ports (e.g. for biometric data transmission),
the UDP frames have the Extra Data field that encodes the end of the frame:
<OPC><NA><ARG><CRC><ETB>[Length][Data]<CRC>
<ETB>
:
Extra Data start indicator (
End Transmission Block
, ASCII
$17
).
[Length]
: [ 4 char: ] This parameter indicates the number of bytes that
are encoded in the Extra Data data field. It is a 16 bit value
expressed by four hexadecimal characters representing a hex-
adecimal four-digit value. The maximum supported length is
912 .
[Data]
:
This contains the Extra Data information. This field will be
made up by
[Length]
pairs of hexadecimal ASCII charac-
ters representing each of the
[Length]
information bytes.
<CRC>:
[ 1 byte ] This field contains a byte value resulting from add-
ing all the ASCII values of
[Length]
and
[Data] in mod-
ule 255 (
<ETB> is not included). Expressed by two
hexadecimal ASCII characters.
8.2. Common Instructions for Online Management
We will first present the instructions that work with any electronics equipped with the
Bio-OCX protocol: BioMax, FingerVein VIM, KBio, Serie-xR Card.
8.2.1. Communications Test
Function: Checks communications with one node.
Instruction
OP
0x00
NA
0x0000
ARG
None.
Response
OP
0x00
NA
0x0000
ARG
None.
