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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
Don't forget that some of the ESP modules have their own resistors on the module...
For example, there seems to be a 4.7k pulldown on GPIO0 on the ESP12F modules I bought from the link @tve posted, unless I botched the soldering job something hardcore.
That could make your board smaller (or at least cheaper).