Arduino Uno R3 (with Atmega 16u2) and MAC OSX 10.11 (El capitan) not working - Arduino Stack Exchange
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How to Restore the Arduino UNO R3 ATmega16U2 Firmware Using the Arduino IDE : 4 Steps - Instructables
Reset ATmega16U2 on Arduino Uno - YouTube
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Arduino from Scratch Part 8: ATMEGA16U2 Subsystem
How to Restore the Arduino UNO R3 ATmega16U2 Firmware Using the Arduino IDE : 4 Steps - Instructables
HootLoader2 allows you to customize the ATMega16u2 USB-Serial bridge on Arduino Uno | Embedded Lab
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How to Reburn the firmware onto Atmega16u2 - Wiki
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