I am using C# and Wiegand 26 reader to read Mifare Ultralight card. When I pass the card, I got '4392072' in decimal but the card UID is '04 43 EB 61 E0 25 80' in hexdecimal.
So how do I use this reader to get the full card UID?
How to read card UID using wiegand 26 reader
1.8k Views Asked by EngBashir At
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You are only getting a part of the 1st anticollision level.
4392072 (DEC) = 430488 (HEX)
This means that your reader is only performing (or only giving to you) a part of the 1st anticollisicon loop. The ISO 14443 - 3 which describes the anticollision loop for the contactless smartcards defines the following procedure for the anticollision loop:
Reader -> '93' (antiollision loop 1 command)
Card <- '88' + '1st byte' + '2nd byte' + '3rd byte'
Reader -> '95' (antiollision loop 2 command)
Card <- '4th byte' + '5th byte' + '6th byte' + '7th byte'
Maybe there is another command which you should perform or your reader maybe only support a 4 byte UID cards?