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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.
@DrAzzy
I can't figure out where the option to not send echo(0) when you send the code over is, though I clearly remember that there was one.
When you don't get the prompt, you can also do ctrl+C out of the (invisible) editor, and then type echo(1) to get the prompt back. Then up arrow will give you the last command before the one that broke it.