UART Windows Driver

kchen@ivcco.comkchen@ivcco.com
in KL730 related discussion

We recently purchased a Kneron Pi; however, the hardware package did not include any setup instructions. A Kneron sales representative provided us with the *KL730 Series HDK Board User Manual (PDF)*. After following the manual, we encountered an issue and became stuck at Section 3.3.

We are unable to connect to the UART because the required driver appears to be missing. When the USB-to-UART device is connected to a Windows machine, it is detected as an unrecognized device instead of being assigned a COM port. The attached PNG illustrates this issue.

Without a proper driver and a recognized COM interface, we are unable to proceed with testing. The provided documentation does not address this situation.

Could you please advise where we can obtain the appropriate Windows driver so we can continue?

Thanks

Comments

  • Maria_KneronMaria_Kneron

    Hi,

    To install the driver for CP2102N USB-to-UART, please refer to this page of our documentation, in the "Using UART" section: The 40-pin Header - KNEO Pi Documentation

    The instructions are collapsed, so you might need to expand it:

    image.png


  • kchen@ivcco.comkchen@ivcco.com

    Hi Maria,

    After installing the driver, we were able to connect to the board via a COM port using PuTTY. We are now trying to evaluate the board’s capabilities, but the only documentation we have is the *KL730 Series HDK Board User Manual (PDF)*.

    So far, none of the commands listed in the manual work in the PuTTY console, except for `printenv`. This makes us wonder whether any firmware is currently installed on the board. How can we verify this? Alternatively, do we need to flash or upgrade the firmware, and if so, what is the recommended procedure?

    It would also be very helpful if a basic startup or getting-started guide were included with the hardware.

    Thanks

  • Maria_KneronMaria_Kneron

    Hi,

    If you purchased a KNEO Pi, you could refer to our KNEO Pi Documentation website: https://kneron.github.io/kneopi-documentation/

    This is the getting started page: https://kneron.github.io/kneopi-documentation/getting-started/index.html

    If it wasn't, please let us know the exact type of your board so we could assist you better, since there are several types of KL730 boards.

    Also, if only printenv is working, it could be because your KL730 is in U-Boot mode. There should be other documentations available on our Developer Center related to KL730: Developers | Kneron – Full Stack Edge AI

    If you can find none of them, you might need to ask our sales representative for permission.

  • kchen@ivcco.comkchen@ivcco.com

    Hi Maria,

    I don't really know what type of board we are getting. I was hoping I can find some info from PuTTY. Here is the output of the 'printenv'. After typing the 'printenv' command, we can get to the OS as root. However, everything was locked. Unable to assign an IP to the board and etc. What's the next step?

    Printenv.png


  • Maria_KneronMaria_Kneron

    Hi,

    If you have a KNEO Pi and you'd like to assign an IP, please refer to this part of the KNEO Pi documentation: KNEO Pi Configuration via the Command Line - KNEO Pi Documentation

    We recommend you to read the Getting Started page to gain a better understanding on the KNEO Pi.

    If you have specific needs or require in-depth technical assistance, please contact our sales representative. Thank you!

  • kchen@ivcco.comkchen@ivcco.com

    Hi Marie,

    We reviewed all the available documentation from the sales representative as well as the materials you referenced. Unfortunately, many of the commands mentioned in the documentation do not work on the board we received. For example, the `nmcli` command is not available.

    Additionally, when we compared the output of `printenv` from your documentation with the output from our board, we observed significant differences.

    Could you please confirm whether there might be an issue with the board we received?

    Thanks.

  • Maria_KneronMaria_Kneron

    Hi,

    So far, I don't see any problem with the board. According to your previous screenshot, your board might be in flash boot mode, where the blue switch is at "ON."

    image.png

    Please switch it to "1" and use a microSD card to install our OS. To install our OS, please refer to the Install OS - KNEO Pi Documentation page. Once you've installed our OS and booted your KNEO Pi, the printenv would look show more information.

    Additional notes are available here, at the Getting Started page: Getting started with KNEO Pi - KNEO Pi Documentation

    image.png


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