But why i dont get same as i have got while connected using (wiegand to rs232)...
It does say on that page why, maybe you missed it. For that project all I needed was a unique number to pass on to the PC. So I took all the bytes that were sent to me from the Wiegand input.
While Wegand specifies the hardware it doesn't specify what the bits mean. The most common thing is to have the first bit and the last bit as parity bits, some time their are other parity bits in the middle. If you want the output of my code to match what you are using then you have to exclude these parity bits. But that means you have to know what your system excluded. Write out what you get from my code and your system in binary on two pieces of paper. Then slide the two along side each other and see where they line up to find out what bits you have to exclude.