Through rs232, send a message to the other end, you can open the port, check to open only after the input message.

Borland RS232
.............\CH06_010.bpr
.............\CH06_010.cpp
.............\CH06_010.exe
.............\CH06_010.obj
.............\CH06_010.res
.............\CH06_010.tds
.............\CH06_010.~bpr
.............\main.cpp
.............\main.ddp
.............\main.dfm
.............\main.h
.............\main.obj
.............\main.~cpp
.............\main.~ddp
.............\main.~dfm
.............\main.~h

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．