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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
The STM32F4Discovery has a chip with less flash and less ram than the one in the Pico - this may not work so well there. The discovery F401 has a similar chip to what the Pico has (while the F411 has a slightly larger one, in terms of ram and flash)