One of the more common questions I get is about making use of the GPIOs in the μArt. I then answer something along the lines of "once you have a kernel recent enough with the new driver, you can just use the standard sysfs GPIO interface like you do with any other single-board computer". But did you know that there are other possibilities beside the sysfs interface? More importantly, did you know that the sysfs interface that everybody talks about and is most commonly used is officially deprecated and strongly discouraged? And besides, what if you don't have a recent kernel with the μArt project's mainline contributions, how can you use GPIOs then? What if you are using Windows, not Linux? This update is all about GPIOs, and we'll cover all your options.