Touchatag RFID Reader - ArchWiki

# Touchatag RFID Reader

Touchatag is a RFID Reader

## About Touchatag

Touchatag is a RFID tag reader from Touchatag. It is a cheap set consisting of an ACR122U USB tag reader and MiFare Ultralight RFID tags.

It is available here.

Remember: Always put a tag on the reader, otherwise you might encounter problems!

## Check hardware version

lsusb shows the device:

    Bus 003 Device 004: ID 072f:2200 Advanced Card Systems, Ltd

lsusb -v shows also the firmware version bcdDevice:

    idVendor           0x072f Advanced Card Systems, Ltd
    idProduct          0x2200
    bcdDevice            1.00

The Version this howto is about is the above ACS ACR122U PICC firmware 1.0.

## Disable pn533 and nfc driver in kernel

When the ACR122U plug in, kernel(>3.5) will automatic load the pn533 driver. With the pn533 driver, pcscd will report "Can't claim interface" error. use below command to disable pn533 and nfc driver in kernel.

    # echo "install nfc /bin/false" >> /etc/modprobe.d/blacklist.conf
    # echo "install pn533 /bin/false" >> /etc/modprobe.d/blacklist.conf

## Install Touchatag

First install this:

    # pacman -S pcsclite ccid

## Test Touchatag

To test the device run:

    # pcscd -f

If you encounter a problem like this:

    ccid_usb.c:859:ccid_check_firmware() Firmware (1.00) is bogus! Upgrade the reader firmware or get a new reader.
    ifdhandler.c:104:IFDHCreateChannelByName() failed
    readerfactory.c:1050:RFInitializeReader() Open Port 200000 Failed (usb:072f/2200:libusb:006)
    readerfactory.c:233:RFAddReader() ACS ACR122U PICC Interface init failed.

The libnfc README suggests to do this:

    If your Touchatag or ACR122 device fails being detected by PCSC-lite daemon (pcsc_scan doesn't see anything)
    then try removing the bogus firmware detection of libccid: edit libccid_Info.plist configuration file
    (usually /etc/libccid_Info.plist) and locate "<key>ifdDriverOptions</key>", turn "<string>0x0000</string>"
    value into 0x0004 to allow bogus devices and restart pcscd daemon.

    Warning: if you use ACS CCID drivers (acsccid), configuration file is located in something like:
    /usr/lib/pcsc/drivers/ifd-acsccid.bundle/Contents/Info.plist
    or
    /usr/lib/pcsc/drivers/ifd-ccid.bundle/Contents/Info.plist

## Optional: Test tags

Install pcsc-tools, start `pcscd.service`, then put a tag on the reader and try to scan with:

    # pcsc_scan

You should get something like this:

    PC/SC device scanner
    V 1.4.17 (c) 2001-2009, Ludovic Rousseau <ludovic.rousseau@free.fr>
    Compiled with PC/SC lite version: 1.6.6
    Scanning present readers...
    0: ACS ACR122U 00 00

    Mon Mar 21 18:16:07 2011
     Reader 0: ACS ACR122U 00 00
      Card state: Card inserted, Shared Mode,
      ATR: 3B BE 95 00 00 41 03 00 00 00 00 00 00 00 00 00 02 90 00

    ATR: 3B BE 95 00 00 41 03 00 00 00 00 00 00 00 00 00 02 90 00
    + TS = 3B --> Direct Convention
    + T0 = BE, Y(1): 1011, K: 14 (historical bytes)
      TA(1) = 95 --> Fi=512, Di=16, 32 cycles/ETU
        125000 bits/s at 4 MHz, fMax for Fi = 5 MHz => 156250 bits/s
      TB(1) = 00 --> VPP is not electrically connected
      TD(1) = 00 --> Y(i+1) = 0000, Protocol T = 0
    -----
    + Historical bytes: 41 03 00 00 00 00 00 00 00 00 00 02 90 00
      Category indicator byte: 41 (proprietary format)

    Possibly identified card (using /usr/share/pcsc/smartcard_list.txt):
    3B BE 95 00 00 41 03 00 00 00 00 00 00 00 00 00 02 90 00
            touchatag SAM card

## Install tagEventor

tagEventor runs in the background and executes scripts when a tag enters or leaves your tag reader.

Download a binary version or compile your own.

Run tagEventor to test your installation:

    # tagEventor -v 1

The scripts are located in /etc/gtagEventor. Read the tagEventor documentation on how to use them.

Category:

- Other hardware