We’ve just posted a tutorial on upgrading the firmware on the ATmega8U2 on the Arduino Uno and Mega 2560. This should resolve the problems that some of you have had with serial communication between those boards and Linux. The upgrade doesn’t require a programmer or other hardware, just adding a resistor to the board and touching a couple of pins together. It’s a safe process, and if it doesn’t work the first time you can do it again.
We’re in the process of testing the new firmwares on other operating systems so that we can begin to ship them as the default on new boards. So far, though, many Linux users have had success with the upgraded firmwares.
Thanks to Dean Camera (author of LUFA) for his help in fixing the firmware.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.