There is! Seeed actually pay to make sure there's an official firmware for it: http://www.espruino.com/WioLTE
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
There is! Seeed actually pay to make sure there's an official firmware for it: http://www.espruino.com/WioLTE