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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
What computer are you using, and do you get it when using the Puck on other computers?
I've had this, but only on Linux - and when it happens for me I can disconnect, shut chrome down, restart it, (sometimes I have to restart Bluez), and it's fine. I don't have to touch the Puck.
Also, try just hitting
Ctrl-Cthen typingecho(1)and enter. It could potentially be that some characters got lost at some point during the upload (although the IDE usually tries to do this automatically to recover)