CONFIG_ARM=y CONFIG_SOC_FAMILY_NRF=y CONFIG_SOC_SERIES_NRF51X=y CONFIG_SOC_NRF51822_QFAC=y CONFIG_BOARD_NRF51_PCA10028=y # enable uart driver CONFIG_SERIAL=y CONFIG_UART_NRFX=y CONFIG_UART_0_NRF_UART=y # enable console CONFIG_CONSOLE=y CONFIG_UART_CONSOLE=y # bluetooth CONFIG_BT=y CONFIG_BT_CTLR=y