The driver is successfully pre installed in advance

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1

Please help me to install ch340g driver for my project. When I'm installing it, it only shows "the driver is successfully pre installed in advance". Please give some link like where to download and the process to install. Please help me!!!!!!!!!!!!

2

I'll assume you are using Windows.

I believe this message comes from the .exe installer for the CH340. I have had some problems in the past with that (maybe user error or solved since then). I'll share the alternative driver installation method that has always worked well for me:

  1. Open the page on the Chinese manufacturer of the CH340's website that provides the driver downloads: http://www.wch.cn/downloads/CH341SER_ZIP.html
  2. Click the button with the cloud and downward pointing arrow to download the driver.
  3. Wait for the download to finish.
  4. Unzip the downloaded CH341SER.ZIP file.
  5. Open the Windows Device Manager.
  6. Connect the CH340-based board to your computer with a USB cable.
  7. You should see a new device ("USB2.0-Serial") appear under the "Other devices" section of the device tree. Double click on it.
  8. Click the Update Driver... button.
  9. Click "Browse my computer for drivers".
  10. Click the Browse... button.
  11. Select the unzipped folder of the download from the WCH website.
  12. Click the OK button.
  13. Click the Next button.

The driver should now install successfully. After that, the CH340-based board should appear in the "Ports (COM & LPT)" section of the Windows Device Manager device tree as "USB-SERIAL CH340 (COMn)" and the board should show up under the Arduino IDE's Tools > Port menu.

3

I'm using windows 11. Will it work?

4

I have tried this but in my device manager there is no such option "other devices".

5

Do you see it under the "Ports (COM & LPT)" section?

6

I have always had that message and it never interfered with uploads to my clone Nanos.

If your board is not recognised by Windows at all, you don't have a driver problem. You might have a bad cable, a charge only cable or you might not have inserted the cable fully.

Which device (Arduino board, TTL-to-USB converter, ...) requires the CH340 driver? Please provide a link.

7

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