Pseudo-Apdus; Direct Transmit; Bi-Color Led And Buzzer Control - ACS ACR122U Manual

6.0. Pseudo-APDUs

Pseudo-APDUs are used for the following:
 Exchanging Data with Non-PC/SC Compliant Tags.
 Retrieving and setting the reader parameters.
 The Pseudo-APDUs can be sent through the "ACR122U PICC Interface" if the tag is already
connected.
 Or the Pseudo-APDUs can be sent by using "Escape Command" if the tag is not presented
yet.

6.1. Direct Transmit

This is the Payload to be sent to the tag or reader.
Direct Transmit Command Format (Length of the Payload + 5 Bytes)
Command
Direct
Transmit
Where:
Lc: 1 Byte. Number of Bytes to Send
Maximum 255 bytes
Data In: Response
Direct Transmit Response Format
Response
Direct Transmit

6.2. Bi-Color LED and Buzzer Control

This APDU is used to control the states of the Bi-Color LED and Buzzer.
Bi-Color LED and Buzzer Control Command Format (9 Bytes)
Command
Bi-Color
and Buzzer
LED
Control
P2: LED State Control
CMD
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
ACR122U NFC Reader API
Document Title Here
Document Title Here
Version 2.00
Class INS P1
0xFF 0x00 0x00
Data Out
Response Data
Class INS P1
0xFF 0x00 0x40
Item
Final Red LED State
Final Green LED State
Red LED State Mask
Green LED State Mask
Initial Red LED Blinking State
Initial Green LED Blinking State
Red LED Blinking Mask
Document Title Here
P2 Lc
Number
of
0x00
Bytes
to send
P2 Lc
LED
State 0x04
Control
Description
1 = On; 0 = Off
1 = On; 0 = Off
1 = Update the State
0 = No change
1 = Update the State
0 = No change
1 = On; 0 = Off
1 = On; 0 = Off
1 = Blink
0 = Not Blink
Data In
Payload
Data In
(4 Bytes)
Blinking
Duration
Control
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