Closed USB to RS-232 adapter = unknown device Tags: Drivers USB Devices CD-Rom Windows XP Last response: October 26, 2011 7:43 PM in Windows XP Share edhiker September 22, 2011 8:57:04 PM Got a new (cheap) USB to RS-232 adapter - CD that came with it was blank. Only info in device properties is: usb\\vid_0000&pid_0000\\5&42A229B&0&1 Can anybody help me? Ed More about : usb 232 adapter unknown device starzty September 23, 2011 2:38:08 AM Have you got a Brand? Your OS and version would be good too. edhiker September 23, 2011 7:00:55 PM Well I thought I would just write off my big expense, but this is what I have. Think both that I bought have PL-2303 chips. Where I bought them - http://www.amazon.com/gp/offer-listing/B002WPR8JC/ref=d... 59c Importer520 And bought for 30c this http://www.amazon.com/gp/offer-listing/B000S5FAF2/ref=s... ...... Both had CDs , one was blank. Downloaded from net a new driver, still get "cannot start (code 10) on one and "unknown device" on other. Win XP and Win 7 on two machines. Ed starzty said:Have you got a Brand? Your OS and version would be good too. Related resources Usb to rs232 driver for vista home free download - Forum USB to RS232 - Forum USB to RS232 - Forum USB Camera with old RS232 notebook - Forum Adding RS232 - Forum Can't find your answer ? Ask ! Get the answer edhiker September 23, 2011 9:27:38 PM Looks like the URLs didn't survive Tom's filters, but if you google B000K02UP8 , it should come up with a picture ad of the device with a (Prolific PL2303HX Chipset) My computers are HP laptop and homemade, both running XP Pro ver 5.1 SP3 Also tried the adapters in a machine running Win 7 ver 7000? beta - same end result. Ed starzty September 23, 2011 9:28:20 PM What driver did you try? the CH341SER? I've actually used one of those in Linux, which I'm sure isn't even a little helpful It's ok, the links behaved for me edhiker September 23, 2011 10:40:18 PM Have not seen " hl-340" or (ch341ser.sys) anywhere in the testing or documentation They seem to be made by Prolific Technology Inc. http://www.prolific.com.tw PL-2303 (Chip Rev H, HX, X) USB to Serial Adapter Windows, Driver v1.4.17 Ed Best solution starzty September 23, 2011 10:51:30 PM Worst case scenario it continues not to work http://www.winchiphead.com/download/CH341/CH341SER.ZIP edhiker September 23, 2011 11:03:35 PM Best answer selected by edhiker. SR-71 Blackbird a b \ Driver October 26, 2011 7:43:43 PM This topic has been closed by Area51reopened Can't find your answer ? Ask ! Publish Related resources: ForumUnknown device USB ForumUnknown device ForumUnknown USB Device ForumHaving problems with USB Rs232 drivers and USB drivers ForumMaking cable: USB to Serial RS-232 DB-9 ? ForumUsb to rs232 driver ForumUsb to rs232 ForumHigh performance laptop with serial ( RS-232 ) port ForumPCMCIA slots need more power??? HELP! ForumHow do I remove write protection from a USB memory stick? ForumUsb ports cannot read any external memory ForumDevice driver for programmable interrupt controller driver device ForumOther PCI bridge device ForumUsb audio device driver xp ForumBase system device for xp More resources Read discussions in other Windows XP categories Configuration Customization Drivers Security Video !