ACR128 Dual Interface Smart Card Reader
Table 1: LED Indicator
Reader States
Red LED
PICC Indicator
Green LED
ICC
Indicator
1. No PICC is found
A single pulse per ~ 10
seconds
2. PICC is present but not activated
Toggling ~ 0.3 Hz
3. PICC is present and activated
ON
4. PICC is operating
Blinking
5. ICC is present and activated
ON
6. ICC is absent or not activated
OFF
7. ICC is operating
Blinking
Table 2: LED Control
CMD Description Description
Bit 0
RED LED
1 = ON; 0 = OFF
Bit 1
GREEN LED
1 = ON; 0 = OFF
Bit 2
RFU
RFU
Bit 3
RFU
RFU
Bit 4
RFU
RFU
Bit 5
RFU
RFU
Bit 6
RFU
RFU
Bit 7
RFU
RFU
To set the LED state of the device, issue the following command:
ACR128 Escape Command
Set LED State
29
01
CMD
To read the current LED state of the device, issue the following command:
ACR128 Escape Command
Read LED State
29
00
Response
Response
Data
E1 00 00 00 01
Status
Use Tables 1 and 2 to format and interpret CMD and Status values.
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ACR128 API
Version 1.7 May 2008
