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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
Thanks for the video!
Do the LEDs go from pulsing alternately to solid when you click the Web Serial button, or just after a set period of time?
Usually when they go from alternately flashing to solid it's because some application on the computer has connected to it and started to send data. The only time I really heard of this happening was when something on someone's computer expected the Pico to be an old-school modem and started trying to send it modem commands, but I'd be surprised if that was happening here!