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Thread: CH340-USB/RS232 Driver

  1. #1
    Join Date
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    Default CH340-USB/RS232 Driver

    Hi:
    FYI: I purchased 3 USB to RS232 adapters and found that the supplied driver disc does not have the correct drivers on it.

    The chip used in the converter is the CH340 and trying to find the correct driver for this thing is like trying to walk through a brick wall. The RS232 plug housing has 340 on it and is dark green in color. It is from China (where else?).

    Most of the sites that said they had the driver for it wanted bucks for it or register or some other obstacle to get it.

    Finally, deep down in a thread on another forum, I found the driver for this thing. It is from the manufacturer and is on their website. It is actually for the CH341 but works perfectly.

    http://www.winchiphead.com/download/CH341/CH341SER.ZIP

    Once the driver is installed, the computer recognizes it as the CH340.

    Hope this helps anyone else who has had this problem.
    Idun



    Lotsa' Patience! (Some days you can't win, the others you lose, and forget about the rest)

    Some mornings I wake up GRUMPY and other days I let her sleep!

  2. #2
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    Default Re: CH340-USB/RS232 Driver

    same thing happen to me
    2 (Renard 64) done
    3 (Renard 24 HV) done
    1 (Renard 48) done
    6 (Renard 16 SS) done
    1 (Renard 64) to build
    16 (SSR EZ) to build
    2 (mighty mini)done
    408 channels

  3. #3
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    Default Re: CH340-USB/RS232 Driver

    Sold

    Great news! I bought one of those a couple of years ago, and couldn't ever get it to work. So........

    F/S - Chineese USB to RS 232 converter $5.00 + mailing (no PP chg.). Use the driver in the link below.
    Please PM if interested.
    USB to RS232 Converter.jpg++
    Last edited by rstehle; 01-10-2011 at 04:34 PM.

  4. #4
    Join Date
    May 2011
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    Default Re: CH340-USB/RS232 Driver

    Hi,
    My USB does not talk to the PC. I think I don't have the right settings on the com port. I am using com3. What should the settings on the com like, such as stop value, error bit value, etc. ? Thanks for any help.

    MJYip

  5. #5
    Join Date
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    Denmak, 4700 Nęstved
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    Default Re: CH340-USB/RS232 Driver

    Quote Originally Posted by MJYip View Post
    Hi,
    My USB does not talk to the PC. I think I don't have the right settings on the com port. I am using com3. What should the settings on the com like, such as stop value, error bit value, etc. ? Thanks for any help.

    MJYip
    Can your pc see the com port ?

    or is it vixen there is not talking to your controller ?
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  6. #6
    Join Date
    May 2011
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    Default Re: CH340-USB/RS232 Driver

    I should say my LED sign board using USB/SERIAL PORT does not talk o my PC. Window XP device manager recognize the USB/Com port, but the USB sign software (i.e., the PC) can not communicate with the sign controller via the usb port. Thanks.

  7. #7
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    Default Re: CH340-USB/RS232 Driver

    Helped me with a unrelated Volkswagen issue.....

    Thanks,
    Tom

  8. #8
    Join Date
    Jun 2014
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    Default Re: CH340-USB/RS232 Driver

    There are more 'up-to-date' CH340 Drivers now on the manufacture's site. See http://www.wch.cn/downloads.php?name=pro&proid=178. Although it states it is for the CH341 it also works with the CH340. I have only tested the Windows drivers. There are drivers also for Linix and Mac.

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