Is WiFi still working if you try and run some code that uses it?
I've also heard of things breaking just because of an iffy micro USB cable - one that'll supply enough power to run Espruino, but won't keep the WiFi powered up as well. So maybe you could try another one too?
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.
Is WiFi still working if you try and run some code that uses it?
I've also heard of things breaking just because of an iffy micro USB cable - one that'll supply enough power to run Espruino, but won't keep the WiFi powered up as well. So maybe you could try another one too?