WiFi with ESP8266
ESP8266 is a low-cost Wi-Fi chip that allow to bring the power of Wi-Fi in any DIY project. There are a lot of modules starting from 2$ that bring this chip very easy-to-use.
Starting from v2.7.0 LaserGRBL support WiFi connection with ESP8266 allowing each hobbyist to get rid of the usb cables between the pc and his engraver.