In many cases, the software is not compatible with modern Windows operating systems. Many of these programs were written years ago, and are not as automated as modern applications. Many legacy devices came with specialized software that is used to communicate with them over a RS232 serial port. Several different variables come into play, and all must be set up correctly to ensure communications. Serial communications over RS232 is a legacy from an earlier age in computer when devices were not necessarily plug-and-play. The drivers load successfully, but I can’t communicate with my device For earlier Windows XP and Vista computers, the drivers must be downloaded from the Plugable website and installed. If an internet connection is not available, download the latest drivers for the cable from the Plugable driver site here. If it does not load, make sure the computer is connected to the internet. When the cable is plugged into Windows 7 or higher computers, the necessary driver should load automatically. Drivers don’t load correctly, or the cable cannot be seen in Device Manager Other problems can include using an improper cable, incorrect port settings, or a basic incompatibility between the Plugable USB serial adapter and the device it is being connected to. A frequent problem is that the software that is necessary to connect to the device does not work under modern operating systems such as Windows 7 or above. Although this usually works well, a number of problems can crop up because many of the devices people want to connect are older devices with various issues. The Plugable USB serial adapter allows you to connect legacy devices that use RS232 serial communications to computers that do not have a serial port. Originally authored by: David Roberts, December 9, 2013 Follow the on screen prompts to install the Prolific serial drivers and when completed the serial adapter should be assigned a COM port number.Now extract the contents of the zip file downloaded in step #1, navigate into the extracted files and double-click on "PL23XX-M_LogoDriver_Setup_40100_20230307.exe" to start the installtion process.Repeat steps 5-7 until the "Ports (COM & LPT)" section shows "USB-Serial Controller D" with an error icon to the left.When completed, right-click on any entry in the Device Manager and select "Scan for hardware changes".Check the box to delete the drivers and then click on the "Uninstall" button to proceed.Right-click on the entry "Please install corresponding PL2303 driver to support WIndows 11 and further OS." and select "Uninstall device".Open the Device Manager (right-click) on the Start Menu and select "Device Manager".Connect the USB to Serial adapter to the computer.zip file to the Desktop or Download folders Download the driver v4.0.10.0 and save the.Driver can auto-download via Windows Update (Windows 7, 8, 8.Prolific has not yet released a Windows 11 driver for the PL2303HXD chipset used in our USB to Serial Adapter, in the meanwhile we can install an older driver to enable this adapter on Windows 11 systems by performing the following: Windows Vista, 7, 8, 8.1 Certified WHQL Driver Compatible with Windows 2000SP4 & Server2003 Installer version & Build date: 1.12.0 () (For PL2303 HXA, XA, HXD, EA, RA, SA, TA, TB versions) This is the Prolific website read on the driver I installed:ĭownload File: PL2303_Prolific_DriverInstaller_v1.12.0.zip July for the ones from the download page) and so Windows prefers it over them. The problem is probably that the non-working driver is the newest (September 2021 vs. I had only one other entry, a "ser2pl.inf" version " 3.8.40.0".ĭisconnect the device, and "pnputil /delete-driver oemXY.inf" with the INF file you located in the previous step.Ĭonnect the device again, and it should work, at least, it does for me. Then "pnputil /enum-drivers", and in the output look for Prolific drivers other than the ones from the previous step. It will add the two driver packages to the driver store and tell you what oemXY.inf files it has assigned to them. What I did is this:įirst install the downloaded driver by unpacking the zip file and "pnputil /add-driver *.inf /subdirs /install" (the /install is probably not necessary) from the extracted "Win11_DCHU" directory. Getting it installed is a bit tricky, it seems. There is a working driver at, a bit down the page listed as "DCHU (for PC Vendors)".
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