ActiveComport Serial Port Toolkit 

Serial port toolkit to enable applications or scripts to communicate with a modem or other serial port device. Features full com port control, binary and ASCII data transfer, support for RS 232 and RS 485 standards and ISDN modem support.
serial port serial port modem modems com comport com port asynchronous rs-485 script scripts tool

Docklight Scripting 

Docklight Scripting is an extended edition of Docklight RS232 Terminal / RS232 Monitor. It features an easy-to-use script language, plus a built-in editor to create and run automated test jobs.
rs232 automated testing automatic testing rs232 crc checksum script scripting diagnostics configuration batch debugging