BTHome with Generic NRF52840 Template project Prerequesites NRF52 SDK nrfutil GNU ARM Toolchain BlackMagic Probe Secure bootloader TODO: howto build secure bootloader Build export GNU_INSTALL_ROOT=/opt/gcc-arm-none-eabi/bin/ export SDK_ROOT=/opt/nRF5_SDK_17.1.0_ddde560 make make firmware.hex make flash