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NEO 2 Interface Developer’s Guide
Copyright © 2019, International Technologies & Systems Corporation. All rights reserved.
58
Asynchronous UI Message Event
Component
UI Type
UI Status Definition
LED
01h
Higher nibble: LED #
00: LED0
01: LED1
02: LED2
03: LED3
FF: all
Lower nibble:
00: Off
01: On
11: No change
Buzzer
02h
Higher nibble:
1: short beeps
2: long beeps
Lower nibble, short beep:
0: No change
1: Single beep
2: Double beep
3: Triple beep
Lower nibble, long beep:
0: 200ms
1: 400ms
2: 600ms
LCD
03h
LCD message index
List of messages and the message flow for one user experience are given in
3.3.1.5.
Data Definitions
Status
Status is a 1-Byte code that indicates success or contains an error code. This can have any
value from 0 to 255.
Asynchronous UI Message Event Status
Status
Value
Description
STATUS_OK
00h
Card read completed successfully
STATUS_EC_CARD_REMOVED
01h
A timeout occurred, card no longer present
STATUS_EC_COMM_ERROR
02h
Some communication error occurred
STATUS_EC_PROTOCOL_ERROR
03h
Protocol not respected
STATUS_EC_MULTIPLE_CARDS
04h
Collisions were detected
STATUS_EC_CARD_NOT_ACCEPTED
05h
Errors found in card information
STATUS_EC_BAD_DATA
06h
Errors found in card information format
STATUS_EC_UNKNOWN_ERROR
FFh
Internal error
Status never has a value that matches the Track 1 and Track 2 start/end sentinels.