Hi,
In gps sample, the prj.conf file is:
CONFIG_BSD_LIBRARY=y CONFIG_STDOUT_CONSOLE=y CONFIG_NETWORKING=y CONFIG_NET_SOCKETS_OFFLOAD=y CONFIG_NET_SOCKETS=y CONFIG_LOG=y CONFIG_LOG_DEFAULT_LEVEL=4 CONFIG_HEAP_MEM_POOL_SIZE=2048 CONFIG_MAIN_STACK_SIZE=4096 CONFIG_UART_INTERRUPT_DRIVEN=y CONFIG_NEWLIB_LIBC=y CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y CONFIG_BOARD_NRF9160_PCA10090NS=y # Disable native network stack to save some memory CONFIG_NET_IPV4=n CONFIG_NET_IPV6=n CONFIG_NET_UDP=n CONFIG_NET_TCP=n
And I can use Putty or Serial.app (on my Mac) to view the output 
In our application the prj.conf file is the following:
# General config CONFIG_NEWLIB_LIBC=y CONFIG_TEST_RANDOM_GENERATOR=y CONFIG_ASSERT=n CONFIG_REBOOT=y CONFIG_SENSOR=y CONFIG_DEBUG=n CONFIG_USE_SEGGER_RTT=n CONFIG_SEGGER_SYSTEMVIEW=n # Trusted execution CONFIG_TRUSTED_EXECUTION_NONSECURE=y # BSD library CONFIG_BSD_LIBRARY=y CONFIG_BSD_LIBRARY_TRACE_ENABLED=n # Library for buttons and LEDs CONFIG_DK_LIBRARY=y CONFIG_DK_LIBRARY_INVERT_LEDS=y # Console CONFIG_CONSOLE_SUBSYS=n CONFIG_CONSOLE_HANDLER=n CONFIG_CONSOLE_GETCHAR=n CONFIG_CONSOLE=n CONFIG_STDOUT_CONSOLE=n CONFIG_UART_CONSOLE=n CONFIG_PRINTK=y CONFIG_SERIAL=n # Main thread CONFIG_MAIN_THREAD_PRIORITY=7 # Enable Bluetooth stack and libraries CONFIG_BT=y CONFIG_BT_H4=n CONFIG_BT_CENTRAL=y CONFIG_BT_GATT_CLIENT=y CONFIG_BT_GATT_DM=y CONFIG_BT_SCAN=y CONFIG_BT_SCAN_FILTER_ENABLE=y CONFIG_BT_SCAN_UUID_CNT=1 CONFIG_BT_SMP=y CONFIG_BT_MAX_PAIRED=5 ##Mcumgr/ # Enable the Bluetooth and shell mcumgr transports. CONFIG_MCUMGR_SMP_BT=n # Allow for large Bluetooth data packets. CONFIG_BT_L2CAP_TX_MTU=260 CONFIG_BT_RX_BUF_LEN=260 # Bluetooth support requires a net_buf user_data size > 7. CONFIG_NET_BUF_USER_DATA_SIZE=8 ##/Mcumgr #CONFIG_UART_0=n CONFIG_UART_2=n CONFIG_UART_2_NRF_UARTE=n CONFIG_UART_2_NRF_FLOW_CONTROL=n # Logging CONFIG_LOG=y CONFIG_BT_GATT_DM_LOG_LEVEL_INF=y CONFIG_AT_CMD_LOG_LEVEL_DBG=y CONFIG_COAP_LOG_LEVEL_DBG=y CONFIG_LOG_PRINTK=y CONFIG_LOG_BACKEND_SHOW_COLOR=n CONFIG_LOG_STRDUP_MAX_STRING=2048 CONFIG_LOG_PROCESS_THREAD_STACK_SIZE=2048 # Heap and stacks CONFIG_HEAP_MEM_POOL_SIZE=16384 CONFIG_MAIN_STACK_SIZE=8192 ##Mcumgr/ # Enable mcumgr. CONFIG_MCUMGR=n # Some command handlers require a large stack. CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048 # Enable all core commands. CONFIG_MCUMGR_CMD_FS_MGMT=n CONFIG_MCUMGR_CMD_IMG_MGMT=n CONFIG_MCUMGR_CMD_OS_MGMT=n CONFIG_MCUMGR_CMD_STAT_MGMT=n ##/Mcumgr # i2c to communicate with accelerometer on thingy CONFIG_I2C=y CONFIG_I2C_NRFX=y CONFIG_I2C_2=n CONFIG_I2C_3=y CONFIG_I2C_3_NRF_TWIM=y CONFIG_JSON_LIBRARY=y CONFIG_FLASH_LOAD_SIZE=0 # Network CONFIG_NETWORKING=y CONFIG_NET_SOCKETS=y CONFIG_NET_SOCKETS_OFFLOAD=y CONFIG_NET_SOCKETS_POSIX_NAMES=y # LTE link control CONFIG_LTE_LINK_CONTROL=y CONFIG_LTE_AUTO_INIT_AND_CONNECT=n CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y CONFIG_LTE_NETWORK_MODE_NBIOT=y CONFIG_LTE_LOCK_BANDS=y CONFIG_LTE_LEGACY_PCO_MODE=y CONFIG_LTE_EDRX_REQ=n CONFIG_LTE_PDP_CMD=y # AT Host CONFIG_AT_HOST_LIBRARY=n CONFIG_UART_INTERRUPT_DRIVEN=n CONFIG_SPM=y CONFIG_SRAM_SIZE=128 # COAP configuration CONFIG_COAP=y # Disable native network stack to save some memory CONFIG_NET_IPV4=n CONFIG_NET_IPV6=n CONFIG_NET_UDP=n CONFIG_NET_TCP=n CONFIG_ZTEST=n # Enable flash operations. CONFIG_FLASH=y CONFIG_FS_FLASH_STORAGE_PARTITION=y CONFIG_FLASH_PAGE_LAYOUT=y CONFIG_FLASH_MAP=y CONFIG_MPU_ALLOW_FLASH_WRITE=y # Enable the NFFS file system. CONFIG_FILE_SYSTEM=y CONFIG_FILE_SYSTEM_NFFS=y CONFIG_FS_NFFS_FLASH_DEV_NAME="NRF_FLASH_DRV_NAME" # Flash circular buffer CONFIG_FCB=y CONFIG_BOOTLOADER_MCUBOOT=y
NOTE: I haven't written the original code, just took over and continuing developing on it.
I have tred to set all the settings from the GPS Sample code in our prj.conf-file ... cleaned the solution, closed & re-opened the solution ... to make sure the prj.conf is "applied" in SEGGER ... and freshly re-built the code ...
But It doesn't seem to work.
I'm guessing there's a one / few settings that maybe are overriding each other? (if you enable option-x, then option-s won't work ... etc etc)
Does someone have a clue to what's going on?
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PS - Yes, if I enable RTT in our prj.conf it works ... but I'd like to use serial-console-logging.
