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I bought several writeable FDX-B tags and I am familiar with identifying and reading tags with PM3. So far I have never written a tag, so this might be a bit of a newbee question.
My tag (and PM3 versions):
Prox/RFID mark3 RFID instrument
bootrom: /-suspect 2015-11-19 10:08:02
os: /-suspect 2015-11-19 10:08:09
LF FPGA image built for 2s30vq100 on 2015/03/06 at 07:38:04
HF FPGA image built for 2s30vq100 on 2015/11/ 2 at 9: 8: 8
uC: AT91SAM7S256 Rev B
Embedded Processor: ARM7TDMI
Nonvolatile Program Memory Size: 256K bytes. Used: 169916 bytes (65%). Free: 92228 bytes (35%).
Second Nonvolatile Program Memory Size: None
Internal SRAM Size: 64K bytes
Architecture Identifier: AT91SAM7Sxx Series
Nonvolatile Program Memory Type: Embedded Flash Memory
proxmark3> lf search u
#db# DownloadFPGA(len: 42096)
Reading 30000 bytes from device memory
Data fetched
Samples @ 8 bits/smpl, decimation 1:1
NOTE: some demods output possible binary
if it finds something that looks like a tag
False Positives ARE possible
Checking for known tags:
FDX-B / ISO 11784/5 Animal Tag ID Found:
Animal ID: 0999-001500030037
National Code: 001500030037
CountryCode: 0999
Extended Data: False
reserved Code: 0
Animal Tag: False
CRC: 0x8A1C - [8A1C] - Passed
Extended: 0x0
Valid FDX-B ID Found!
proxmark3> So how can I wrote my own data in this tag? Which commands do I need? I also have the windows GUI but I see no reference to FDX-B or ISO 11784/5 for writing.
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There are a large number of chips that can be used for the fdx b format. You'll need to identify the exact chip. Then if that chip doesn't yet have a write operation in the pm3 firmware, you'll need to add it with data from the chip datasheets and code it.
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How do I find out the chip?
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You could ask your supplier for the details and a datasheets.
You could try the lf t55xx detect method of the pm3, if it happened to be that chip it might detect.
You could disassemble the chip and attempt to identify it if it has any markings inside it.
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Well it's round yellow and a pin kan be placed through the centre.
like these: http://www.aliexpress.com/item/134-2khz-ISO-11784-785-rfid-animal-ear-tag-for-pet-cattle-sheep-pig-management-100pcs/32413512451.html?spm=2114.40010308.4.92.8j9yWN
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So far I found similar tags with em4100, em4200, em4205, em4305 chips. my supplier didn't list the chip... Does this make my question (how to write / clone to this tag) easier?
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How do I find out the chip?
I have found out if you dip your fob/card in solvent-thinner (other word for a glue thinner) such as "No1 Solvent thinner 1L" for 10', then you can carve\fish out your microchip and even the delicate antenna, very easily, just with a toothpick.
Last edited by ntk (2016-05-31 22:41:52)
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