RFIDeas & Reverse Wiegand bits crap

[BachPhi]

Using RFIdeas Configutility, I read in raw my Hex data as follow: BBBA2164 IF I put a check mark on the "reverse wiegand bits" (not bytes), I will get 26845DDD from which I can extract out 5DDD which is my ID in hex. What I like to know is What are the Wiegand bits and how did they reverse the bit to go from BBBA2164 to 26845DDD. Thanks in advance.

[Michael Lloyd]

I have no idea but I found this: 26-Bit Wiegand Format Bit 1: Even parity over bits 2 to 13 Bit 2 to 9: Facility Code (0-255), Bit 2 is MSB Bit 10 to 25: ID Number (0 - 65,535) Bit 10 is MSB Bit 26: Odd Parity over bits 14 to 25 Now to figure out what to do with the 6 extra bits Edited May 3, 2013 by Michael Lloyd

[Michael Lloyd]

Onward through the fog. Looking at it with BFA (brute force analysis) and no idea what I'm doing when it comes to RFID Hex BBBA2164 in Bin is 1011 1011 1011 1010 0010 0001 0110 0100 Hex 26845DDD in Bin is 10 0110 1000 0100 0101 1101 1101 1101 Looking at the pattern of bits to see what has been reversed 1011 1011 1011 1010 0010 0001 0110 0100 is reversed to 0110 1000 0100 0101 1101 1101 1101 Or in other words BBBA216 is reversed to 6845DD IDK... maybe I'm on the wrong track but is seems to match up nicely