Ahh - I have no idea why yet, but I think something's got confused in the hardware - I've had this once or twice before. Try disconnecting and reconnecting the battery (usually you can do it just by gently lifting it away from the PCB)
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.
Ahh - I have no idea why yet, but I think something's got confused in the hardware - I've had this once or twice before. Try disconnecting and reconnecting the battery (usually you can do it just by gently lifting it away from the PCB)