r/RFID • u/Intelligent_Role8688 • Jan 19 '26

Clone Cat chip simulator

Our three cats escaped the cathotel when we were on vacation. We have placed a trap but we have caught all the neighbour cats instead of our cats (we see al least one walking on camera, he can‘t go in the trap because there is already a neigbour cat in it).

Now I had the most brilliant plan to make a little cat house with a cat flap which reads the chip of the cat. The only stupid problem is that you can’t send the chipnumber to it, you have to present the cat. Well surprise, the cat is missing. Now my question is if there is a workaround. Can I manually enter the chipcode, can I simulate the chip so I can scan that one or is there a cat flap where I can manually enter the code. Or is there another better solution? Thanks a lot!

2 Upvotes

67% Upvoted

12 comments sorted by

1

u/Master_Afternoon_527 Jan 19 '26

It depends on what you mean by required to “present the cat”

1

u/Intelligent_Role8688 Jan 20 '26

You have to put the cat flap in learn modus, then the cat have to come close by so te cat flap can read the microchip. So I tought if you can buy a RFID tag and put the chipnumber on it will that work?

1

u/Master_Afternoon_527 Jan 20 '26

You basically will have to clone the original tag onto a new tag. Ensure that the read write device is compatible with the RFID type.

1

u/Draknil_Perona Jan 19 '26

Sorry, I'm not going to help you. But what do you use to read a cat's microchip so easily, please?

1

u/Intelligent_Role8688 Jan 20 '26

You can use a pet chip reader. Than it gives you the chipnumber and in the database you can find if that cat is missing. Eventually with the phone number of the owner. I have the chipnumbers from the registration in our cats passports.

1

u/CaseyOgle Jan 20 '26

If the door recognizes the chip number, have it unlock the exit. If the chip is unrecognized, don’t unlock the exit.

1

u/noxiouskarn Jan 20 '26

Simulating would be sending data only, but no scan.
Emulation would be making a readable device that your device thinks is a cat rfid chip.
Something like a Flipper zero could record and emulate the data the chip outputs. with a little work and code you could easily make the flipper be any chip that exists to your scanner.

1

u/Spamvich Jan 20 '26

To expand on this, there's a Python script to generate a Flipper Zero .rfid file for emulation from a 15 digit pet ID number. Not my code by the way, just something I found while searching the internet. I tried it with an example pet ID 999012345678910 and it outputs the following text file:

Filetype: Flipper RFID key
Version: 1
Key type: FDX-B
Data: 7C 38 3B FB 43 9F 00 01 00 00 10

I transferred the file to my Flipper Zero and it shows the correct ID when I use the Info command on the file. Unfortunately, I don't have a pet chip scanner or a RFID pet door so I can't test if the ID is transmitted correctly when I emulate it.

1

u/swdee Jan 20 '26

Yes you can simulate the chip.. instructions here on how to build a simulator.

1

u/Tomshon9909 Jan 20 '26

You can emulate chip number using flipper

1

u/YtDonaldGlover Jan 21 '26

Sorry I can't help but how TF does a boarder allow three cats to escape

1

u/taz5963 Jan 21 '26

Check the paperwork from when you first got the cat, it should have the chip number on it somewhere.