EMUTAG - Easiest control for read and write (Page 2 of 2)

I know this is thread is a little old, but I hope you see it. 
I too could not use the MIFARE++ Ultralitght app at all.  It NEVER read anything.  Even failed on my EMUtag whereas the RFID NFC Tool app worked.
HOWEVER, I found there is a specific process ( sequence of events) that must be followed or you will get no response.  Here they are.
0 - Make sure that the battieries are installed and the little paper that says 'Pull Me' is removed.  Dont ask me why this is # 0.
1- Make sure your android NFC is on ( in the settings)
2- Open the app ( MIFARE++ Ultralight ).
3- Press the READ button.
4- NOW place the phone over the EMUtag (real close or touching ).  You may need to move the phone a little to find the android NFC antenna. 

It is a little slow, but it works.
It has read perfectly for me ( 8 of 8 tries )

Hope this helps.

Richie, This should help you some.  The easiest way to get started is to copy/paste kallt_kaffe data that he posted here ( http://www.soliforum.com/post/134377/#p134377 ) into a text file.  It is currently set up with a valid UID, Password and PACK.  You can just use it as is.  You MUST save it with only LF ( not CR LF ) for the end of line.  The easiest way is either to use Linux, or use Notepad++ and under the EDIT -> EOL Conversion -> select UNIX (LF).  An easy way to test it is done correctly is after saving the file, open it in NOTEPAD ( not NOTEPAD++) and it should appesaar as a long single line.
Now just transfer that file to your android phone, and using the MIFARE++ Ultralitght app, Load the file and Write the file to the EMUtag.  You are now ready to use it.

Now, for the CSV file and how to read it, hear is an example ( first line )
Card UID                                            Psw                              PAK   
4    6C    64    2A    B4    42    80        8A    4E    27    6C        8B    1E
^
Note the 4 above is 04 as excel drops the leading 0

The first 3 bytes (04 6C 64 ) goes into Page 0, ( and counting bytes left to right starting at 0 ) bytes 0, 1 2.
The next 4 bytes (2A B4 42 80) goes into Page 1, bytes 0,1,2,3

The Psw ( Password ) goes into Page 0x2B ( 43 decimal ) bytes 0,1,2,3
The Pack goes into Page 0x2C (44 decimal) bytes 0,1.

See this link for Page and data dafynitions. -> http://www.soliforum.com/post/128824/#p128824

So I hope that answers you questions.  Have fun..........

EDIT: how did you hook up your EMUtag to the plug?  I want to do the same thing and wanted your input.  thanks

I am a little confused with this post. It appears as though you are powering the EMU Tag from the Nano. How are you updating the EMU Tag using the same Nano?

Wouldn't it be easier to get a PN532, attach it to your Nano and update with it? Just solder the pins on the opposite side of the EMU.

I can't really help with an Adroid as I don't have a phone that's capable.