Yes you can write to free flash check out the Flash module
http://www.espruino.com/Reference#Flash
@Ollie 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.
Yes you can write to free flash check out the Flash module
http://www.espruino.com/Reference#Flash