This sigrok decoder is for the ISO 11784/11785 standard to decode FDX-B 134.2kHz RFID transponders. It is untested with sigrok, but is used with DreamSourceLab's DSView application which is a sigrok fork.
Install DSView using that projects instructions on linux, once installed
the sigrok decoder library directory is at /usr/local/share/libsigrokdecode4DSL/decoders/
.
Clone this github project into that directory
cd /usr/local/share/libsigrokdecode4DSL/decoders/
git clone https://github.com/swdee/fdx-b-decoder.git fdx-b
Start DSView and select FDX-B
as the decoder.
Screenshot of decoded transponder tag.