You can control 2 stepper motors via Wifi and a tablet. Full project available on github and thingiverse. See: <a target="_blank" rel="noopener noreferrer" href="https://www.thingiverse.com/thing:2312476">https://www.thingiverse.com/thing:2312476</a> and <a target="_blank" rel="noopener noreferrer" href="https://github.com/Eisbaeeer/ESP8266-LEGO-Control">https://github.com/Eisbaeeer/ESP8266-LEGO-Control</a> for more information.