Dec 21, 2020 • Filed to: USB Recovery • Proven solutions

The Velocitek Control Center is a free application for Windows and Mac OSX that lets you download GPS data from your Velocitek device, version 3.0 features direct. USB™ multi-port adapters with Ethernet connectivity and some Ethernet adapters are not compatible at this time (due to IC design). Click here for more information. The display driver does not support Mac® computers with the M1 processor at this time, contact your computer manufacturer to verify if your computer supports the display driver. On Windows 10, a device driver is an essential piece of code, which allows the system to interact with a specific hardware (such as graphics card, storage driver, network adapter, Bluetooth, etc.

Have you ever had difficulty connecting your devices to your computer using a Prolific USB to Serial adapter? If yes you are lucky to find this page, it will give you all the information need to fix an unresponsive Serial driver adapter. You may have noticed a yellow exclamation mark hovering over or beside the USB to Serial Driver when searching your Device Manager and if you have we can all agree that it signifies a prevailing problem.

Overview of the Error

Velocitek Port Devices Driver License Test

If you are not able to connect your device to your PC using a USB to Serial adapter it may be that

• The USB driver is outdated
• The USB Driver is missing
• Or even a corrupted driver

While you can't be so sure what the exact problem is there are solutions you can adopt to fix the issue once and for all. Read on to find quick fixes to resolve the problem.

1# Fix Prolific USB to Serial Driver not Working

Solution: Roll your Prolific USB to Serial Driver back to an older version

Updating your drivers often work wonders for your system because it makes sure that it runs on the latest features that guarantee maximum functionality. Unfortunately updating your drivers can cause this kind of error especially if your latest update does not work too well with your hardware. Once you upgrade your PC to the latest Windows version your Prolific USB to Serial Driver also updates to the latest driver software and if the driver is not compatible with your Hardware issues may arise. To correct the error, you will have to download the driver again by following these steps.

• Right-click on your PC Start button and open Device Manager

• Double click LPT and COM ports then locate the Prolific USB to Serial Driver and right-click it so you can select Update Driver

• For driver software click My computer

• From My computer select 'Let me pick from a list of drivers available'

Velocitek Port Devices Driver Updater

• Choose an older version from the list then click Next

• The driver you selected will be installed automatically
• Once it has been downloaded reconnect the driver to see if it works.

2# Fix Prolific USB to Serial Driver 'Coder 10'

Driver issues reveal themselves in so many ways or through messages such as

• This device will not start (Code 10)
• There is no driver installed in this device
• The driver was not successfully installed

A code 10 error may arise because the chip you are using is not an original one. If you are using a fake, the manufacturer has a way of disabling it due to copy write infringement and the copy write takes effect once you download a recent update. To protect your PC from getting this code, you will have to make sure that your Windows 10 never updates a driver without approval. Updates come in the form of 64 bit and 32-bit drivers. Below we will show you how to work your way around the problem.

Window 64 bit Fix

To fix Windows 64 bit OS including Prolific USB to Serial Adapter, follow through these steps.

• Download 'PL2303_64bit_Installer.exe and Save
• Remove every USB to Serial adapter from your PC and double click the 'PL2303_64bit_installer.exe
• Follow the prompt by plugging in one USB to Serial adapter the click on Continue
• Reboot your PC to get Windows up and running

If you have followed these process through and you still see the same error go to your device manager

• Open the control panel and navigate to Device Manager
• From your control panel navigate to the System category and click the Hardware tab
• Scroll to the LPT/COM port and double click Prolific USB to Serial Comm Port
• Click Drivers in the Properties section
• The Driver you choose should read '3.3.2.102 with an appropriate date attached
• If the date is wrong then it means the wrong driver was installed
• Unplug the Serial adapter and run the steps again to install the correct driver

Window 32-bit

For Windows 32-bit OS systems follow these steps

• You will have to download the 'PL-2303_Driver_Installer.exe and save from Microsoft download link
• Run the program and eradicate the driver if you can
• Run the installer once more to install a correct driver

To Troubleshoot for error if your device still does not work

• Go to Control panel, enter System to access your Device Manager
• Scroll down to the LPT/ COM port then double click Prolific USB to Serial Comm Port
• Click Driver in the Windows Properties section
• The driver must be numbered as '2.0.2.8' and dates accordingly

If the driver was not installed, remove the Serial adapter then run 'PL2303_Driver_Installer.exe' again. Follow directions in Device Manager to download the correct driver

The three solutions listed in this article have proven to be quite helpful in fixing a Prolific USB to Serial driver not working on Windows 10. They may appear confusing at first but if you follow each step in detail you can resolve the issue.

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Introduction

There are a host of RS232 based data acquisition and control products available on the market. These devices can be used with Universal Serial Bus ( USB ) ports using our new ADU series of USB data acquisition and control interfaces. The ADU USB data acquisition and control interfaces feature a variety of I/O accessed via a USB port. All ADU products also feature an auxiliary RS232 port that allows access to RS232 based devices. Visit our Progarmming page to view tutorials on sending and receiving ASCII data via COM ports, or making API calls to USB devices, in virtually any programming language.

For example, the ADU200 USB Relay I/O Interface can be use to provide a USB to RS232 conversion while adding additional relay I/O to an application

The following illustration shows how an ADU200 can be used to connect an ADR2205 RS232 Relay I/O Interface to a USB based host computer.

For more details on these unique products view the ADU200 USB Relay I/O Interface product data sheet and the on-line SDK in the programming section of this site.

USB to RS232 Converters

Another method of connecting RS232 devices to a USB based host is to use a USB to RS232 converter. These devices connect to the host computer USB port via a USB cable and provide a DB25 or DB9 serial port for use with RS232 devices. The example will demonstrate how the ADR2200 RS232 Relay I/O interface can be used to provide relay I/O to a USB equipped host computer.

ADR2200 RS232 Relay I/O Interface

Getting Started

To connect an ADR2200 to a USB based computer, all that is required is a USB to RS232 converter , a standard A-B USB cable, an RS232 cable and the ADR2200 target device. The host computer must be running Windows 98SE, 2000 or XP operating system. There are a host of USB to RS232 devices available on the market and we have selected the Peracom US1000A for our example.

Figure 1 A: Peracom US1000A USB to Serial Converter (Available from USBSTUFF for $64.95US.)

Figure 1 B: USB to Four RS232 Port Adaptor ( Edgeport/4 from Inside Out Networks.)

Note: A four port version ( Figure 1B ) is available from Inside Out Networks that allows four RS232 ports to be derived from a single USB port. We have extensivelly tested this unit and recommend it for systems requiring use of many RS232 peripherals, such as POS ( Point-Of-Sale ) applications.

Installing the USB to RS232 Converter

The USB to RS232 converter is shipped with a Windows driver disk . When the converter is connected to the Windows based host computer, Windows will display the 'Found New Hardware' screen and will prompt the user for a driver for the device. With the driver disk installed in drive 'A', select the 'Have Disk' option and browse the driver disk to the appropriate driver. Once installed, the USB converter will be assigned the next available COM port on the host computer. To verify the proper set-up, open the 'System' icon in the 'Control Panel' and click on the 'Device Manager' tab. Under 'Ports', there should now be a new COM port labeled 'USB Serial Port'. ( See Figure 2. )

Figure 2: USB Serial Port Configured as COM3

Writing Application Software

We are now ready to write data acquisition application software to access the ADR2200 RS232 Relay I/O interface connected to the USB to RS232 converter. Since the USB to RS232 converter is configured as an actual COM port, the application software can access the ADR2200 as if it were connected directly to the host computer through the specified COM port. Programs can now be written in Visual BASIC, Visual C++, TestPoint or LabVIEW. ( click on links for specific examples )

Adding More Data Acquisition Capabilities

The ADR2200 RS232 Relay I/O interface is one in a family of serial data acquisition devices that are manufactured by Ontrak Control Systems Inc. All ADR2000 series devices feature daisy-chain capabilities allowing additional relay I/O, analog I/O, digital I/O , PWM outputs and event counters to be added to the application. The devices are daisy-chained via a simple 2 or 4 wire connection allowing up to 10 interfaces to be connected to a single USB to RS232 converter device. Figure 3 shows how an ADR2200 could be daisy-chained with an ADR2000A data acquisition interface

Figure 3: USB Data Acquisition using ADR2200 and ADR2000A