so i am trying to get the data from a mifare card and i can't get the same reading i get on windows.
On windows my card data is a 10 digit code like: 4852658522
Even though i can dump the data on the card i can't translate it to get the same 10 digit code.
Anyone has done this before?
Using python to read and dump the data.
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What data do you get in RPi? – Michael Aug 29 '17 at 12:38
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I can dump all the sectors on the Mifare card – Tiago Martins Aug 29 '17 at 12:49
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no, you wrote that in windows you get 10 digit code, what code do you get in RPi? How are you reading the data in windows? – Michael Aug 29 '17 at 12:54
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2@TiagoMartins The data on the card can be converted to a number in a million million million ways. The PC code is using one conversion. You need to know how it makes that conversion. There is no point in guessing. – joan Aug 29 '17 at 13:33
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1It can be UID of the card. The UID is 4 bytes, as I know. So, with the RPi read the sector 0 of the card and post it here. – Michael Aug 29 '17 at 14:44
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Sector 0 [48, 63, 172, 124, 223, 136, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0] Windows reading: 2091663152
2091663152 represented in hexadecimal is 7C AC 3F 30. If those bytes are shown in decimal they are 124 172 63 48.
It is too much of a coincidence to believe those happen by chance to be the first four numbers in sector 0. I guess they are the UID as Michael suggested.
So read the first four numbers from sector 0, call them n1, n2, n3, n4.
The UID is then (n4<<24 | n3<<16 | n2<<8 | n1).
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Well, i've reached a similar conclusion in the meanwhile. I've been able do do the conversion and can now get the same readings on windows and the pi. ty – Tiago Martins Aug 30 '17 at 18:34
