Also, when you attach power to it, does the red led blink? Can you enter bootloader mode by holding the button while applying power? (the green LED should be on constantly in bootloader mode)
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.
Do you have a photo of it?
Also, when you attach power to it, does the red led blink? Can you enter bootloader mode by holding the button while applying power? (the green LED should be on constantly in bootloader mode)