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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.
@JumJum
Depends, on how you create firmware.
If you use Espruino Build Tools, there is a precompiled lib and sdkconfig
Otherwise you have to setup a local platform, run through make sdkconfig, etc.
AFAIK, ESP-IDF uses 2nd core for wireless tasks.