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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've thought "oh wouldn't it be cool to make an Espruino with one of the 100-pin or 144 pin chips", to get more I/O (an Espruino Ventii?). The 407 looked good for that, and has 192k RAM (and is that on-chip wired ethernet?!). Like the F401 in the Pico, I think that's a reasonable ratio of pins to ram. It could be the Espruino answer to the Arduino Mega... but as you get more pins, the potential pool of projects that need that many pins (and hence the number of potential customers) shrinks.
I think if you need 400mhz processor, though, you're really looking at a job that's more appropriate to run on an RPi...