see http://www.espruino.com/Reference#File and http://www.espruino.com/Reference#l_E_openFile
@ekarak 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.
see http://www.espruino.com/Reference#File
and http://www.espruino.com/Reference#l_E_openFile