delphi 串行口通讯控件，带源码，开发串口程序，必须到工具。-delphi serial port communications control, with source code, the development of serial procedures, the instrument must be.

obd2汽车故障及状态检测程序，用delphi SPCOMM 232通讯方式发送OBD2指令-using OBD2 protocol to query status or read the fail code the car ,sending the OBD2 Command using delphi code with spcomm