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Hi fellows,
I just met this ordinary looking FPKEY-SSSSS-0000 tag same like this
"http://www.cardquest.com/media/catalog/product/cache/1/thumbnail/97x/9df78eab33525d08d6e5fb8d27136e95/f/p/fpkey-ssss-0000.png"
But what unusual is that it has 2 codes inside. 2 fixed codes, randomly switch to another one when you read it.
Does anyone know this is achieved?
2 chips inside? if so, how does the anti-collision work?
Thanks
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If you are running an old pm3 firmware then you are likely seeing an old bug in the code.
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@marsh, I think you are right, I didn't read it on pm3, just read the code this from another arduino board.
PM3 returns a consistent code.
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