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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
You will definitely need to update the software on your Pico.
What operating system do you have? On Windows, you need to be careful not to unplug your Pico while the Web IDE is still connected. If you do you may have to shut down Chrome, unplug the board again, and then restart Chrome - unfortunately it is a bug in Chrome itself.