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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.
@fanoush
yes, you are not flashing full firmware including softdevice and bootlader, that would show several sections of
Adding extra erase rangeacross whole chipbootloader is not strictly needed but softdevice definitely is. the hex file is in espruino source tree or there is zip with the hex file downloadable from Nordic (S132 3.1.0)