User's Manual

Table Of Contents
User Identification System Function interface of device driver
User's Manual, Version: 1.01 63
© KEBA 2008
9 Function interface of device driver
With the aid of the Kemro UserID simple and easy integration into exist-
ing visualization systems is possible.
This chapter describes the commands of the device driver of the Kemro
UserID for accessing the module and transponders recognized by the
module.
9.1 Data format
Data can be stored on the RFID transponder either in Euromap 65 format,
or in binary form. The format is set by the write command used.
9.1.1 Euromap 65 Standard
The user data on the RFID transponder are displayed in Unicode UTF-8
format and stored with the byte sequence Low-Byte-First (Little-Endian).
The data are stored as a sequence of parameters and formatted as follows:
<ID><len><parameter...><ID><len><parameter...>...
Parameter Description
ID
Identification of the parameter (8-bit value)
len
Number of attached parameters in 8-bit units (optional,
depends on parameter)
parameter
Value of the parameter
9.1.2 Binary format
When using the binary format the user data transferred to the device driver
are stored directly on the transponder. These data are not specially format-
ted.
9.2 Data structure
Information
An alignment of 1 applies to all data structures listed here