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[:WindowsTricks: Windows Tricks]

Resetting a Serial Port's RTS and DTR Signals when Windows Starts

de Joe W4TV

You can reset a serial port's RTS and DTR signals on Windows startup by creating a Windows Batch File containing the appropriate command, and then creating a Window Shortcut to this Batch File in the Windows Startup Folder. To reset COM3's RTS and DTR signals, for example, use Windows Notepad to create a Batch File named RESETCOM3.bat that contains

MODE COM3; dtr=off rts=off

On Windows XP, the pathname of the Windows Startup Folder is

C:\Documents and Settings\%username%\Start Menu\Programs\Startup

where %username% is the username you used to log in to Windows.

On Windows 7, the pathname of the Windows Startup Folder is

C:\users\%username%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

To create the required Shortcut, run two instances of Windows Explorer. In the first instance, navigate to the folder in which you created RESETCOM3.bat; in the second instance, navigate to the Windows Startup Folder. Then depress-and-hold the ALT key while dragging RESETCOM3.bat from the first instance of Windows Explorer to the second; when you release the left mouse button, a shortcut to RESETCOM3.bat will appear in the Windows Startup Folder.


[http://groups.yahoo.com/group/dxlab/post Post a question or suggestion on the DXLab reflector]

[:TransceiverControl:Getting Started with Transceiver Control]

[:Multimode_Setup:Setting up CW, Phone, PSK, and RTTY Operation]

[:WindowsTricks: Windows Tricks]

[:GettingStarted:Getting Started with DXLab]

ResetCOMDTRRTS (last edited 2018-07-04 19:41:50 by AA6YQ)