I can no longer download sketches to my Uno WiFi Rev 2 with Mega4809 processor.
I think I damaged the bootloader. As a test, I’m now trying to download an empty sketch. (see picture)
I have another Arduino to use to program, but in visiting Mr. Gammon’s site to review the bootloader programming process, I was not sure which bootloader to pick as I did not see a Mega4809 processor listed. Will the ATmega329 Optiboot work?
Best regards, Bloor
----- Additional Information ----------
The previous sketch remains programmed (and still runs).
The green L LED does not flash on pressing reset.
The board passes a loopback test.
The board now missrepresents itself as Atmel atmega328pb Xplained mini to Create rather than the Arduino Uno WiFi Rev 2 it previously identified itself as. (see pic)
Sketches appear to start to download using the Create Tool, but then hang. The tool does not report the fuses are in place, etc.
I probably did it to myself as I had accidentally had wires plugged into Digital Pins 1, 2 during a download.