So I am trying to connect to a piece of hardware. If I connect and disconnect with hyperterminal first. Then close the connection and the program. Everything works fine. If I don't I receive random characters back from the hardware. I use the same settings in hyperterminal as I do in the code.

baud=9600

Mar 10, 2011 - If you mean HyperTerminal, it's no longer included in Windows 7. Use Phone and Modem Options instead: Open Phone and Modem Options. HyperTerminal Alternatives One great free alternative to HyperTerminal is the Windows Remote Shell or WinRS command. WinRS is a command line that can replace SSH. So if you used HyperTerminal just to SSH into a server you can use the WinRS command to do so. To run WinRS for SSH access, open the command prompt.

parity=n

data=8

stop=1

Hardware flow controls 'ON':

octs=on to=on dtr=on rts=hs

If I then disconnect the hardware and the serial port I will have the same problem again.

Is there anyway I can see how to comport is being configured after hyperterminal open and closes the port? I should note I am using a prolific serial to USB adapter.

Below is the code I use to open the com port.

3 Answers

Please, try Advanced Serial Port Monitor -> Spy mode. http://www.aggsoft.com/serial-port-monitor.htm. It will show all actions that Hyperterminal does on the port. Then you can repeat these settings. It seems that the problem is related with the hardware flow control settings.

Below is the code I used to fix my problem. I only ever had to do it this way for one piece of equipment.

BuildCommDCB() fails if 'rts=hs' is included in the control string. This causes lpDCB to be not set correctly, and SetCommState is called with the wrong values.

You can set the RTS control flag in the lpDCB structure after calling BuildCommDCB. (I would include code but I'm not certain on the Basic syntax)

Not the answer you're looking for? Browse other questions tagged vbaexcel-vbavbscriptvb6serial-port or ask your own question.

Hi,

Terminal mode is not included in Windows 7. There are several options you can use to accomplish the same tasks:
If you only need remote shell access, you can use WinRS (Windows Remote Shell).

To open WinRS, follow these steps:
1. Go to start and type in cmd in search box and press enter.
2. In the command prompt, type winrs /? and press enter.
There are also many other third party terminal programs. Please search using your favorite search engine for more information.

Note: Using Third Party Software, including hardware drivers can cause serious problems that may prevent your computer from booting properly.
Microsoft cannot guarantee that any problems resulting from the use of Third Party Software can be solved. Using Third Party Software is at
your own risk.

If you have Windows 7 professional or Ultimate, then You can install XP Mode on your computer and Hyper terminal will be available to you.

Refer these links for help:
http://www.microsoft.com/windows/virtual-pc/download.aspx
http://windows.microsoft.com/en-US/windows7/install-and-use-windows-xp-mode-in-windows-7

Regards,
Afzal Taher-Microsoft Support.
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