Wiegand（韦根）协议是由摩托罗拉公司制定的一种通讯协议，它适用于涉及门禁控制系统的读卡器和卡片的许多特性；其协议并没有定义通讯的波特率、也没有定义数据长度韦根格式主要定义是数据传输方式:Data0 和Data1 两根数据线分别传输0 和1.现在应用最多的是26bit,34bit，36bit，44bit 等等。-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.