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USB to Serial Cable not working (Prolific)

Anonymous
2025-06-03T13:25:02+00:00

I work in a factory setting with multiple RFID readers to read RFID totes carrying products. We are bringing up a new project. One month ago, I tested the USB to Serial Cable and got RFID reads every time the tote passed over the reader on Windows 11. We recently updated to the 24H2 version of Win 11 and cannot get a read. The drivers show up fine in Device Manager, the cable shows COM4 with normal port settings at 9600. There are no errors in device manager. There are no event errors. However, the reader will not read the RFID chip installed in the tote. I have tried multiple totes and they will not read.

Addendum: The readers will not read to CMD Prompt or NotePad. However, if I connect to the readers using a terminal emulator, they read in the emulation program, but reads are isolated to the term program.

Windows for home | Windows 11 | Devices and drivers

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  1. Anonymous
    2025-06-09T14:57:33+00:00

    Hi,

    Thank you for the response. Since it has the same issue after performing all of the possible troubleshooting steps then you can try to reach out live support for further assistance.

    You'll need to follow the steps below to contact a Microsoft representative by phone or chat. They are the only people we can respond to, investigate, and address your concerns. If you would like to contact our phone or chat team, you can do so by following the link below.

    Please take note that this link is in English:

    https://support.microsoft.com/home/contact?ContactUsExperienceEntryPointAssetId=S.HP.outlook

    Once you've opened the link, do the following:

    (1) Provide a brief description of the problem and click Get Help.

    (2) Click Contact Support at the bottom of the result that appears.

    (3) After identifying the problematic product, click OK , and

    (4) Finally, you can contact the Office chat representative or get a call from the Office phone representative.

    Best Regards,

    Fordy B.

    Microsoft Community Moderator

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  2. Anonymous
    2025-06-05T19:32:13+00:00

    Drivers are fine and are compatible. Port settings good. Manufacturer quit responding after I told them I could use their term application to manually connect to the reader.

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  3. Anonymous
    2025-06-05T15:38:32+00:00

    Hi,

    We have noticed that you  have not replied to our last response. We would like to know if the issue you have raised to us is still on-going. If yes, please reply to the thread so we can continue troubleshooting your concern.

    Regards,

    Fordy B.

    Microsoft Moderator

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  4. Anonymous
    2025-06-03T17:56:38+00:00

    Hello,

    Welcome to the Microsoft Community Forum. Please accept our warmest regards and sincerest hope that all is well despite the situation you find yourself in.

    It seems like the issue might be related to the recent Windows 11 update. Let's try a few troubleshooting steps to resolve the problem:

    1. **Update Drivers**: Even though the drivers show up fine in Device Manager, it's worth checking if there are any updated drivers available for the USB to Serial Cable. Visit the manufacturer's website to download and install the latest drivers compatible with Windows 11.
    2. **Check Compatibility**: Ensure that the USB to Serial Cable and the RFID readers are compatible with the 24H2 version of Windows 11. Sometimes, certain devices may not work properly with the latest updates.
    3. **Check Port Settings**: Verify that the port settings (COM4, 9600) are correct for the RFID readers. You may also try changing the port settings to see if that resolves the issue.
    4. **Test on Another PC**: If possible, test the USB to Serial Cable and RFID readers on another Windows 11 PC to see if the issue persists. This can help determine if the problem is specific to the current PC or the devices themselves.
    5. **Contact Manufacturer Support**: If the issue persists after trying the above steps, consider reaching out to the manufacturer of the USB to Serial Cable and RFID readers for further assistance. They may have specific troubleshooting steps or updates to address compatibility issues with Windows 11.

    Hope this helps.

    Best Regards,

    Fordy B.

    Microsoft Community Moderator

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