I have been uploading sketches to my Arduino Mega 2560 for quite some time now, but after uploading a new sketch, I am unable to upload anything at all, including blank setup() and loop() functions. When uploading, I get upload output (verbose) like this: Binary sketch size: 678 bytes (of a 258048 …

Can no longer upload ANY sketches to Arduino Mega 2560 - timeout at upload

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