USB to RS-232 adapter = unknown device

Have you got a Brand? Your OS and version would be good too.

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

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

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

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 answer selected by edhiker.

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