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#1 2017-07-19 02:13:50

brantz
Contributor
Registered: 2014-03-19
Posts: 50

Indala with 2 codes

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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#2 2017-07-19 02:15:10

marshmellow
Contributor
From: US
Registered: 2013-06-10
Posts: 2,302

Re: Indala with 2 codes

If you are running an old pm3 firmware then you are likely seeing an old bug in the code.

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#3 2017-07-19 02:44:32

brantz
Contributor
Registered: 2014-03-19
Posts: 50

Re: Indala with 2 codes

@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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