Arduino UNO Update USB Firmware: ● Get new firmware: https :// github . com / arduino / Arduino / tree / master / hardware / arduino / firmwares / arduino - usbserial / ● Select Arduino-usbserial-uno.hex, click on the file in the list then right click on “raw” and click “Save as“ ● Check md5sum: for the 4 th December version: 8e01ee236e70bbea43f7eb4e11c9688a ● Install DFU Programmer tools: sudo aptitude install dfu-programmer ● Put the chip into DFU programming mode: ● Sequence: ○ Hold the 1 st wire on the top left 8U2 ICSP pad ○ Hold the 2 nd wire on the left side of the capacitor below the RX LED ○ Remove both wires ● Be careful with the second wire as the capacitor is quite near a 5v track. Try using a low-