"I'm working with nRF Connect SDK v2.2.0 for nrf52840 and I'm trying to implement file transfer functionality using mcumgr over UART in Application. I've successfully configured and verified firmware upgrade using mcumgr in mcuboot , but now I need to transfer ordinary files, not firmware files in Application. Can you provide a step-by-step guide on how to set up and use mcumgr for transferring regular files over UART in nRF Connect SDK v2.2.0?
And suggest any other method apart from using mcumgr to tranfer file from hos to nrf52840 over uart?
Here is my config
CONFIG_STDOUT_CONSOLE=y
CONFIG_USB_DEVICE_STACK=y
CONFIG_HEAP_MEM_POOL_SIZE=4096
CONFIG_MAIN_STACK_SIZE=24576
CONFIG_LOG=y
CONFIG_USB_DRIVER_LOG_LEVEL_ERR=y
CONFIG_USB_DEVICE_LOG_LEVEL_ERR=y
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_UART_LINE_CTRL=y
CONFIG_SPI=y
CONFIG_CBPRINTF_FP_SUPPORT=y
CONFIG_ENTROPY_GENERATOR=y
CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_GPIO=y
CONFIG_PRINTK=y
CONFIG_RTT_CONSOLE=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_NEWLIB_LIBC=y
CONFIG_PTHREAD_IPC=y
CONFIG_POSIX_API=y
CONFIG_MAX_PTHREAD_COUNT=20
CONFIG_TIMESLICING=y
CONFIG_TIMESLICE_SIZE=2
CONFIG_UART_CONSOLE=n
#CONFIG_APP_WIPE_STORAGE=y
CONFIG_FILE_SYSTEM=y
CONFIG_FILE_SYSTEM_LITTLEFS=y
CONFIG_FLASH=y
CONFIG_FLASH_MAP=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_NEWLIB_LIBC_NANO=n
CONFIG_STDOUT_CONSOLE=y
CONFIG_NORDIC_QSPI_NOR=y
CONFIG_NCS_SAMPLES_DEFAULTS=y
CONFIG_BT=n # BT disabling completely
CONFIG_BT_PERIPHERAL=n # BT disabling completely
CONFIG_MCUMGR=y
CONFIG_MCUMGR_CMD_FS_MGMT=y
# CONFIG_MCUMGR_GRP_FS=Y
CONFIG_BASE64=y
CONFIG_FLASH=y
# CONFIG_IMG_MANAGER=y
CONFIG_NET_BUF=y
CONFIG_ZCBOR=y
CONFIG_FLASH_MAP=y
CONFIG_STREAM_FLASH=y
#CONFIG_MCUMGR_GRP_FS_FILE_ACCESS_HOOK=y
#MGMT_DEF_EVT_OP_ALL
# Enable most core commands.
# CONFIG_MCUMGR_CMD_IMG_MGMT=y
CONFIG_MCUMGR_CMD_OS_MGMT=y
# Ensure an MCUboot-compatible binary is generated.
CONFIG_BOOTLOADER_MCUBOOT=y
# Allow for large Bluetooth data packets.
#CONFIG_BT_L2CAP_TX_MTU=252
#CONFIG_BT_BUF_ACL_RX_SIZE=256
# Allow for large Bluetooth data packets.
# BT disabling completely
#CONFIG_BT_L2CAP_TX_MTU=498
#CONFIG_BT_BUF_ACL_RX_SIZE=502
#CONFIG_BT_BUF_ACL_TX_SIZE=502
#CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
# Enable the Bluetooth (unauthenticated) and shell mcumgr transports.
CONFIG_MCUMGR_SMP_BT=n # BT disabling completely
CONFIG_MCUMGR_SMP_BT_AUTHEN=n
CONFIG_MCUMGR_SMP_BT_CONN_PARAM_CONTROL=n # BT disabling completely
CONFIG_MCUMGR_SMP_REASSEMBLY_BT=n # BT disabling completely
CONFIG_MCUMGR_BUF_SIZE=2475
#CONFIG_OS_MGMT_MCUMGR_PARAMS=y
# Some command handlers require a large stack.
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
# Enable file system commands
#CONFIG_MCUMGR_CMD_FS_MGMT=y
# Required by the `taskstat` command.
CONFIG_THREAD_MONITOR=y
# Enable logging
CONFIG_MCUBOOT_UTIL_LOG_LEVEL_WRN=y
CONFIG_MCUMGR_SMP_SHELL=y
CONFIG_LOG_MODE_IMMEDIATE=y
#SMP for UART
CONFIG_MCUMGR_SMP_UART=y
#To increase the UART/USB transfer speed for DFU Upload FW
CONFIG_CONSOLE_INPUT_MAX_LINE_LEN=1240
CONFIG_UART_MCUMGR_RX_BUF_SIZE=1240