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Us Patent Nos 4603 Driver


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Hello, this is my first thread here. I have been having trouble connecting my Meade DS-2114S to my laptop. I have to use a USB to Serial adapter, but the autostar software does not find my telescope, I suspect it may be the driver for the comm3 port not working correctly in Windows 10. Actually, I'm not sure what the problem is. Is there a special driver for this to work in Windows 10 If anyone knows what may be happening I would appreciate some help. Thanks


When I upgraded my laptop from Windows 7 to Windows 10 my USB serial adapter no longer worked. When I went into Windows device manager I could see it had an error. After some research I found out that it had an old chipset used in the USB serial adapter and it was no longer supported. There was no driver for Windows 8 or Windows 10. So I went out and bought a new one off of ebay for $13:


If your USB/Serial adapter has a Prolific PL-2303 chips set, you can go to Prolific site and download their latest drivers. In the download package is a CheckChipVersion.exe and it will tell you the chip sets version. Windows 8, 8.1 and 10 are NOT supported in PL-2303HXA and PL-2303X versions of the chips. There is also a warning about counterfeit clone chips coming from china.


The profilic driver works for many of the USB/Serial adapters. Often a windows 10 update will remove the driver, requiring you to re-install it. The automatic update and driver search will not find it.


This is a well know problem of many old Prolific devices, including some chinese fakes (see the Prolific web site for details). A possible solution, working under Windows 10, consists of forcing the system to use an old version of the driver. In my case the driver version 3.24.25.218(07/10/2010) works perfectly.


a) Install in your computer a working old version of the driver. Installation must be done when the PC is NOT connected to the web, to avoid the automatic installation of the last Windows 10 non compatible version of the driver. You may get the old working driver from one of the chinese vendors in Ebay (not available from official Prolific Channels).


b) Remember to use always the same USB port to connect the USB-to-RS232 cable to your PC.. If you use a different port, the PC will automatically load from the web the Windows 10 driver and the USB-to-RS232 cable will not work any more.


c) If case b) occurs, open the Windows device manager, and update the driver of the Prolific USB-to-RS232 Comm Port. Choose to manually install a driver already present in your PC and force the PC to install the working old version of the driver.


I've now upgraded all 5 of my computers to Windows 10. I use a wide range of astronomy software. Every upgrade has gone smoothly. I have not had to reinstall a single item. The problem with Prolific chip sets has been around since Windows 8. It's really up to the chip vendors to upgrade their drivers, not Microsoft. I use the FTDI stuff so it's not a problem on either of my mounts. I'm sure, though, that many people bought the prolific (I bought two back in 2008) based on recommendations from the telescope/software vendors. I may try the suggested work around because I still have two of these sitting in my parts drawer gathering dust and who knows when I might need one for something..


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I will be moving from PC to Mac, but will need to run a Windows application that uses a serial port, using boot camp. Would I be right in thinking I would need to install this adapter under Windows using a Windows driver


Prolific seem to be deliberately isolating compatibility against these devices in the newest Windows drivers, and wondered if thats the same with the m




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