Identfying mystery rfid keyfob

Bit of an update.
The USB HID arrived (14 days delivery, 30 miles from me…).
My Proxmark3 Easy & NExT arrived (24 hours, US to UK!).
I’ve built up a test rig with the access control board and enrolled our existing keyfobs. Picked up a couple of random em fobs and they work too. The HID scans the fobs not problem. All looking good so far.

@amal A couple of observations for the proxmark3 getting started. This is on Windows 10 with Proxspace 3.7.1. You might want to note these variations in the guide.

  1. First couple if installations failed pretty early on, I had to suspend antivirus to get it to complete successfully.
  2. I didn’t get any break and re-run prompt. Installation seemed to run all the way through with no issues.

Firmware update appears to have gone well. I can lf search various tags and get results back. I haven’t gotten around to copying/cloning/writing anything yet. I have a couple of spare tags to mess with, but they are showing as “couldnt identify a chipset”, but show a valid EM421x ID. My original tag is a T55xx.

I’ve ordered a stack of T5577/EM4305 tags from amazon, they should be with me tomorrow.
What should be my next step? Copy the ID of the existing tag to a new tag?

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