I'm just guessing wildly (as you might already have surmised), but have you tried "Resetting without loading any code" from the link I posted earlier?
@Old_account 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.
I'm just guessing wildly (as you might already have surmised), but have you tried "Resetting without loading any code" from the link I posted earlier?