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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.
@Gordon
That sounds like it could be a good thing to sort out - for Espruino to reset the voltage has to drop below 2v, so it looks like you have some pretty major power supply issues.
Are you saying you've got the ILI9341 connected as well? It's possible that the backlight running off the 3.3v rail isn't helping.
Which board are you using? The Pico, or Original Espruino? I don't think the original Espruino's voltage regulator is powerful enough to handle the peak power draw of the ESP8266 (it's rated at 150mA I think?). Ideally you'd add a second voltage regulator, but if not then go for big capacitors - like 100uF or so, and it might help you out. The 6v-rated caps are really quite small.