problem uploading onto arduino nano (Ubuntu18.04/Windows10) about wallet

[ricmoo]

Those warnings look unrelated.

I’ve had that error before on macOS when the cable I was using was power-only (didn’t support data), so you may try changing the cable? Or check the driver.

Does the standard blink sketch load ok?

[ricmoo]

(sorry; didn’t mean to close the issue, I tapped the wrong button)

[JosefJ]

Setting up an old bootloader worked for me: Tools > Processor > [...] (Old Bootloader)

[ricmoo]

Oh yes! Make sure the boot-loader matches your Arduino device.

The Firefly firmware works with either the "old boot loader" or the the new "Optiboot", but you must select in the IDE the one that matches your device.

[0xthreebody]

@ricmoo I have the same issue, change arduino use ATmega328 (Old Bootloader) some time OK, But in the Fritzing can't change to ATmega328 (Old Bootloader). so have same issue, can't upload on the Fritzing

[ricmoo]

You mean you are trying to upload using Fritzing? I have not ever used software other than the Arduino IDE; I didn’t even know that Fritzing had uploading capabilities. Can you try the Arduino IDE instead?

[0xthreebody]

Fritzing's code view, upload to put the Simulator running.