CJMCU ATMEGA32U4 uploud fails

Development Tools IDE 1.x
2

Hi @gkmuuupil. Please run this simple test to make sure that /deve/ttyACM0 is really the port of your CJMCU-Virtual Keyboard board:

  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.

If you don't see a new port appear, then we need to investigate that problem.