![]() Here's how to update the firmware on your 16u2 in a few steps.Ĭheck whether you need to update the firmware It runs software called firmware (so named because you couldn't change it once it had been programmed in the chip) that can be updated through a special USB protocol called DFU (Device Firmware Update). ![]() Previous versions of the Uno and Mega2560 had an Atmega8U2. The ATmega16U2 chip on your Arduino board acts as a bridge between the computer's USB port and the main processor's serial port. Updating the Atmega8U2 and 16U2 on an Uno or Mega2560 using DFU
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