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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.
@allObjects
In addition to facilitate USB host, the GPIOs of the MAX3421E make it even a port extender. A cool thing for shimming to the PICO. I'm though inclined to use BLE to attach respective devices. It makes the connectivity less hardw(e)ary, but still has the challenge of handling USB input...