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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.
@MaBe
@parasquid Ok, so you build Espruino for BOARD=NRF52840DK
The neopixel lib and the nRF5x code for ws2812b are the same, but NRF52840DK is using the SDK 15.