Model 152 Smart Card Reader/Writer Operation Instructions
8182760 Revision G Copyright Axiohm 1998 All Rights Reserved
Page 1.2
There are two types of commands which can be sent to the reader. The first type is used to
manipulate the reader (LEDs, status, etc.). The second type is used to manage I/O with cards.
Tables 3 & 5 show the commands of each type.
Table 3 - USI2 Reader Commands
ASCII
HEX
Name
Use
%
25
Retransmit
Retransmits the last message again
9
39
Version Report
Transmits Version String
DEL
7F
Warm Reset
Simulates power cycle
$
24
Reader Status
Request
Transmits Reader Status Bytes
(see Tables 7 & 8)
L
4C
Green LED ON
Turns on Green LED
l
6C
Green LED OFF
Turns off Green LED
(
28
Green LED FLASH
Flashing Green LED (Firmware Beta 2.22 &
later)
M
4D
Red LED ON
Turns on Red LED
m
6D
Red LED OFF
Turns off Red LED
)
29
Red LED FLASH
Flashing Red LED (Firmware Beta 2.22 & later)
C
43
Select Card Connector
Selects the card connector to be used with the
following card I/O commands
T
54
Memory Card Type
Select
Selects the type of Memory Card for use with the
following Memory Card Commands
8
38
Switch Report
Read and report state of card seated switch
(Firmware Beta 2.22 & later)
#
23
Configuration Request
Transmits Reader Configuration Bytes
USI2 Reader Command Details
Retransmit Command. Use this command when you detect a communication error in a
message received from the reader. The reader will re-transmit the last response it transmitted
before this request. The host may request re-transmits as many times as it likes.
Version Report. Use this Command when you want to know the version of the Model 152
firmware currently loaded. The response is an ASCII string giving the firmware ID.
Warm Reset. Use this command when you want the reader to simulate a power cycle. As on
any power up, the Power Up Message will be sent by the reader.
