You mean 'save()' is hanging for you? It's possible it's the code you uploaded.
Can you try a 'cutting edge' build, just in case? http://www.espruino.com/Download#RAK8212
@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.
You mean 'save()' is hanging for you? It's possible it's the code you uploaded.
Can you try a 'cutting edge' build, just in case? http://www.espruino.com/Download#RAK8212