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I've followed your instructions and believe or not take 40 minutes to discover that the processor option is only available when selecting nano in "Board option". Also added more information about the problem. Thanks by the way

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edit approved Mar 19, 2019 at 10:16

Rodrigo

Another fix:

Change Tools->Processor->Atmega 328P to Atmega 328P (Old Bootloader). Remind that the Processor option is only available when you select some specific Boards at Tools>Board.

This worked for my Arduino Nano with CH340, using Arduino IDE 1.8.5 under Linux Ubuntu 17.10. Besides, this will probably happen if you use IDE 1.8.9 or newer and you get an old or cloned Nano.

Another fix:

Change Tools->Processor->Atmega 328P to Atmega 328P (Old Bootloader).

This worked for my Arduino Nano with CH340, using Arduino IDE 1.8.5 under Linux Ubuntu 17.10.

Another fix:

Change Tools->Processor->Atmega 328P to Atmega 328P (Old Bootloader). Remind that the Processor option is only available when you select some specific Boards at Tools>Board.

This worked for my Arduino Nano with CH340, using Arduino IDE 1.8.5 under Linux Ubuntu 17.10. Besides, this will probably happen if you use IDE 1.8.9 or newer and you get an old or cloned Nano.

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answered Mar 2, 2018 at 19:40

aguadopd

Another fix:

Change Tools->Processor->Atmega 328P to Atmega 328P (Old Bootloader).

This worked for my Arduino Nano with CH340, using Arduino IDE 1.8.5 under Linux Ubuntu 17.10.