UDP方式IC刷卡机示例代码，利用delphi的indy控件实现udp广播-UDP mode IC card machine sample code

网络重传选择协议，可以检查传输信息的正确性。通过接受方的校检，通知发送方重新发送。- Network retransmission protocol, you can check the correctness of the transmission of information. By accepting the prosecution s school to notify the sender to resend.