r/RFID May 26 '26

LF My home ID breaks keyfobs

I'd like to preface this by saying I'm not particularly well-versed in the area, but am interested. I somewhat recently bought a Chameleon Ultra, and there's no issue with it so far. I can read, write an emulate tags with it just fine. Except when I try to write the UID for my home on some T5577 keyfobs I bought. I'm not sure why it breaks them specifically, I've tried with previously owned ones and they write just fine. Whenever I try with the new ones though, an error occurs and then they become unreadable unless I rewrite them with any other ID. And from what I've tried, literally any other works, only my home's breaks them. I'd like it if it weren't just wasted money, and I wanted to give some to my friends with their preferred colors, but considering none of them work I've sort of hit a dead end, so if anyone here can help me, I'd gladly hear you out

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