[SOLVED]Windows 11 Arduino can't upload

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Hi @DickyOZ.

Which exact version was that?

You can check whether the port is your Arduino board by doing this:

  1. Unplug your Arduino board from the computer.
  2. Select Tools > Port from the Arduino IDE's menus.
  3. Note the ports, if any, listed in the menu.
  4. Close the Tools menu.
    The ports list is only updated when the Tools menu is re-opened, so this step is essential.
  5. Plug your Arduino board into the computer.
  6. Select Tools > Port from the Arduino IDE's menus. - The new port listed in the menu is the one for your Arduino board.

COM1 is often an internal port on your computer, not related to the Arduino board. But it is possible that it is the Arduino board. The procedure I described above will tell you which it is.

Do your ESP32 and Wemos D1 Mini boards use a CP210x chip? They usually either use that one or the WCH CH340. If the latter, then you will need to install the CH340 drivers.

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