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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.
unknowndomain
@Gordon
I guess it's an Espruino Original judging by the blue LED?
What do you mean by various cables? To get into bootloader mode you should only need to use a normal USB cable, and then hold down BTN1 while tapping RST.
Dim blue+red means the board hasn't initialised at all, bright blue+red means it is waiting for a USB connection, and pulsing blue means it's properly in bootloader mode.