Introduction - If you have any usage issues, please Google them yourself
Wiegand (Wiegand) protocol by Motorola to develop a communication protocol, which apply to access control system card readers and many of the features of the card its agreement and the absence of a definition of communication baud rate, nor the definition of data length Wiegand data format is defined as the main means of transmission: Data0 and Data1 two data transmission lines, respectively, 0 and 1. now the most widely used is 26bit, 34bit, 36bit, 44bit and so on.