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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.
@Hawky
In fact, when I'm typing something on the black panel, nothing is shown...
It's like I can't type anything in it.
Even the example "1+2", nothing is shown.
I'm connected to my esp8266 using an USB TTL.