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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
Have you connected to both USB connectors? To get at Espruino's USB you've got to use the USB connector near the headphone jack, but you also need the other connector to provide power.
It's worth checking in
control panel -> devicesto see if the driver is properly installed and to check if the COM port is correct too (it could be the port is for something else).