![]() In this case, install Java Runtime Environment with the Windows Online option. Opening the application may prompt a ‘Could not find a Java Virtual Machine’ error. Take a note of the device name, which should be either ATmega16U2 and ATmega8U2. If it is missing, follow these steps before proceeding. Use the name from the successful command in the following steps.ĭisconnect and reconnect the board to your computer.Įxpand the libusb-win32-devices category. One of these command should read the memory successfully, and print it to terminal or indicate if it’s empty. Note: For older versions of dfu-programmer, replace read with dump for the commands above. Identify the chip model by trying the following commands: dfu-programmer atmega16u2 read Program the chip with the firmware Using dfu-programmer (macOS/Linux)ĭownload dfu-programmer from the GitHub repository or install the dfu-programmer package using a package manager like homebrew (macOS) or apt-get (Ubuntu). Select the firmware for your board, most likely one of the following: BoardĪrduino-usbserial-atmega16u2-Mega2560-Rev3.hexĪrduino-usbserial-atmega16u2-MegaADK-Rev3.hexĪrduino-usbserial-atmega16u2-Uno-Rev3.hexĢ. Within the platform directory, the usb to serial firmware is found in firmwares/atmegaxxu2/arduino-usbserial. Alternatively, you can download and extract the repository from the GitHub page (Code > Download ZIP). ![]() The platform comes installed with Arduino IDE by default, and can be found in the Arduino15 directory: Arduino15/packages/arduino/hardware/avr/. The firmware is included in the Arduino AVR Boards platform. Note that this article does not apply to the Uno WiFi Rev2, which uses a different chip with closed source firmware. The converter chip firmware can be flashed with a computer by setting the board to DFU mode (Device Firmware Update). The following boards use either an Atmega16U2 or Atmega8U2 chip as a USB-to-serial converter: ![]()
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