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This fixed the same issue for me with ProMini, as it has variants with ATmega168 and ATmega328p. Turned out my board had the 168, but Arduino IDE defaults to 328p when you select the ProMini.

spinpwr
– spinpwr

2025-01-30 15:59:48 +00:00
Commented Jan 30 at 15:59
1

This was the fix for my arduino nano (ch340). IDE 2.3.6

insaner
– insaner

2025-06-18 07:42:06 +00:00
Commented Jun 18 at 7:42

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