@SERIALPORTFLUSH[n]:  Flush the contents of the serial port buffer. n is the handle returned by a previous call to @SERIALPORTOPEN. Returns 1 if the flush succeeded, or 0 if it failed.

 

Example:

 

set port=%@serialportopen[com1,9600]

set string=%@serialportread[%port]

echo %@serialportwrite[%port,Goodbye!"

echo %@serialportflush[%port]

echo %@serialportclose[%port]