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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.
@dwallersv
A quick followup: Another "NodeMCU" variation that is less expensive and more compact is the Wemos D1:
As cheap as U$4.24 on ebay. Just a hair over the lower prices for raw 12-E boards (U$1.99), but easily usable right away with USB, 3.3V regulator, PCB gpio attachments, reset button, etc.
Only limitation is not all GPIO pins are accessible. Got one, works just like the bigger NodeMCU board (without the LEDs, buttons, and access to a few GPIOs).