ACR1281U-C2 – Reference Manual
Version 1.00
www.acs.com.hk
Page 3 of 15
1.0. Introduction
ACR1281U-C2 is a contactless card UID (Unique Identification Number) reader especially designed to
get the UID of any ISO 14443 Parts 1-4 Type A and B–compliant contactless card in an efficient way.
When a contactless card (e.g., MIFARE® DESFire® card) is tapped onto the ACR1281U-C2, the
reader retrieves the UID and automatically returns the UID to the computer. Since it is HID (Human
Interface Device)–compliant, this device does not require any additional driver to be installed in the
computer. However, its only function is to retrieve the card’s UID and display it directly in any text
editor such as Notepad, Microsoft® Excel and Microsoft® Word. The ACR1281U-C2 also has an anti-
collision feature that ensures only one card is accessed when multiple cards are presented at the
same time.
ACR1281U-C2 Card UID Reader is HID–compliant. It can also support Windows®, Linux®, Mac
OS®, and other embedded systems.
This document will discuss the commands and instructions on how the ACR1281U-C2 Reader Card
UID output can be configured using escape commands.
Figure 1
: ACR1281U-C2 Sample Application
