You don't need a robot arm, just mimic a usb keyboard. https://pikvm.org/ https://pikvm.org/ and similar exist. This is maybe not as good as the article solut

You don't need a robot arm, just mimic a usb keyboard. https://pikvm.org/ https://pikvm.org/ and similar exist. This is maybe not as good as the article solution, because it requires you to secure the pi too.