arson88 , If you want to see the characters received by the PC you should be running a terminal emulator program that will allow you to see the hex value of the received byte. I always use an old program called QMODEM which allows you to see any non printable characters like control characters. You do realize that there are more than 127 non printable characters that are possible to be sent via RS-232. I do not use Hyperterminal as the screen view is not big enough. There are a lot of other programs out there that will allow you to view the received byte value... Just look...

Dave Purola,
N8NTA