You should see "USB-SERIAL CH340" or a similar entry assigned to a specific port (e.g., ). 3. Configuring Your Software
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Troubleshoot > Advanced options > Startup Settings > Restart to "Disable driver signature enforcement." 3. Step-by-Step Installation Extract Files : Right-click the downloaded ZIP and select "Extract All". : Open the folder and run the setup application (often CH341SER.EXE Connect Hardware : Plug in your plotter via the USB cable. Device Manager Check Right-click the button and select Device Manager Look under Ports (COM & LPT) You should see "USB-SERIAL CH340" or a similar