The Arduino Uno R3. Atmega328P-PU. On the small square chip is written ATMEL MEGA32U2. I connect the jumper. The device disappears from device Manager. Remove the jumper - the device again appears as Arduino Uno. How to switch to DFU mode? [image] [image] [image] [20171101_175109_1509548556268…

How to enable DFU mode?

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