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USB to RS-232 adapter = unknown device

Got a new (cheap) USB to RS-232 adapter - CD that came with it was blank.
Only info in device properties is:

Can anybody help me?

8 answers Last reply Best Answer
More about adapter unknown device
  1. Have you got a Brand? Your OS and version would be good too.
  2. 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 - 59c Importer520

    And bought for 30c this
    ...... 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.


    starzty said:
    Have you got a Brand? Your OS and version would be good too.
  3. 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.

  4. 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
  5. Have not seen " hl-340" or (ch341ser.sys) anywhere in the testing or documentation

    They seem to be made by
    Prolific Technology Inc. PL-2303 (Chip Rev H, HX, X) USB to Serial Adapter
    Windows, Driver v1.4.17

  6. Best answer
    Worst case scenario it continues not to work
  7. Best answer selected by edhiker.
  8. This topic has been closed by Area51reopened
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