Maybe try the capacitor, between VCC and GND. Also without being connected to wifi - do you have more success loading a sketch?
@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.
Maybe try the capacitor, between VCC and GND. Also without being connected to wifi - do you have more success loading a sketch?