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

de Joe W4TV

  1. in a CMD window, execute the following commands:

    1. set devmgr_show_nonpresent_**devices=1

    2. cd c:\windows\system32

    3. start devmgmt.msc

  2. in the Device Manager window that appears after step 1.c,

    1. in the View menu, select Show Hidden Devices

    2. click on the + or triangle to the left of Ports to display a list of all present Ports
    3. click the Port you wish to delete, and strike the Delete key

    4. when asked, confirm your intention to delete the Port


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