nRF52 DK Failed to add BLE OTA DFU to the example project ble_app_uart

Question

Hi, I'm using nRF52 DK. I'm following tutorial links 1 , 2 and 3 to learn how to add BLE OTA DFU to the example project ble_app_uart. 
 Step 1 
 Following the above links, I created a new project called 1325.ble_app_uart_dfu.zip , which contains ble_app_uart and BLE OTA DFU functions. 
 
 Step 2 
 build the \examples\ble_peripheral\ble_app_buttonless_dfu code to get the "ble_app_buttonless_dfu.hex" build the \example\dfu\secure_bootloader code to get the "bootloader.hex" build the our own application code to get the "ble_uart_ota.hex" 
 
 Step 3 
 In win10 cmd, use the following commands: 
 nrfutil settings generate --family NRF52 --application ble_app_buttonless_dfu.hex --application-version 3 --bootloader-version 2 --bl-settings-version 2 settings.hex

nrfjprog --eraseall -f NRF52

nrfjprog --program s132_nrf52_7.2.0_softdevice.hex --verify -f NRF52

nrfjprog --program ble_app_buttonless_dfu.hex --verify -f NRF52

nrfjprog --program bootloader.hex --verify -f NRF52

nrfjprog --program settings.hex --verify -f NRF52

nrfjprog --reset -f NRF52

nrfutil pkg generate --application ble_uart_ota.hex --application-version 4 --hw-version 52 --sd-req 0x0101 --key-file priv.pem ble_uart_ota.zip


 
 All files are 20211006 BLE OTA UART EXAMPLE.zip . 
 
 Step 4 
 Now, on my mobile app nRF Connect, I could see a BLE signal named Nordic_Buttonless. I connected it and clicked the DFU button on the top right corner. Then, download my own firmware zip file to the nRF52 DK. 
 Then, I could see Nordic_Buttonless disconnects automatically. A new BLE signal named DFUTARG is connected. After a few seconds, DFUTARG disconnects automatically. Nothing else is connected. My own application BLE signal doesn't exist. 
 
 Does anyone have any idea, please? Thanks a lot!

Amanda Hsieh · Accepted Answer

Hi, Not sure where is wrong with your project, but the basic rules are as the following: 1. Add source code to nRF_DFU folder: \components\ble\ble_services\ble_dfu\ble_dfu.c \components\ble\ble_services\ble_dfu\ble_dfu_bonded.c \components\ble\ble_services\ble_dfu\ble_dfu_unbonded.c \components\libraries\bootloader\dfu rf_dfu_svci.c 2. Add DFU headfile User Include Directories: ../../../../../../components/libraries/bootloader ../../../../../../components/libraries/bootloader/ble_dfu ../../../../../../components/libraries/bootloader/dfu ../../../../../../components/libraries/svc 3. Modify sdk_config.h: BLE_DFU_ENABLED 1 NRF_SDH_BLE_VS_UUID_COUNT 2 //increase 4. Add the following Preprocessor Defines: NRF_DFU_SVCI_ENABLED NRF_DFU_TRANSPORT_BLE=1 BL_SETTINGS_ACCESS_ONLY 5. Includ the following file in main.c: #include “nrf_dfu_ble_svci_bond_sharing.h” #include “nrf_svci_async_function.h” #include “nrf_svci_async_handler.h” #include “ble_dfu.h” #include “nrf_power.h” #include “nrf_bootloader_info.h” 6. Add the following functions from ble_app_buttonless_dfu example to main.c static bool app_shutdown_handler(nrf_pwr_mgmt_evt_t event){}; NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0); static void buttonless_dfu_sdh_state_observer(nrf_sdh_state_evt_t state, void * p_context){}; NRF_SDH_STATE_OBSERVER(m_buttonless_dfu_state_obs, 0) = {}; static void ble_dfu_evt_handler(ble_dfu_buttonless_evt_type_t event){}; 7. Initialize DFU buttonless service in main.c/services_init ble_dfu_buttonless_init_t dfus_init = {0}; // Initialize DFU buttonless. dfus_init.evt_handler = ble_dfu_evt_handler; err_code = ble_dfu_buttonless_init(&dfus_init); APP_ERROR_CHECK(err_code); 8. Initialized the async SVIC interface in main() // Initialize the async SVCI interface to bootloader before any interrupts are enabled. err_code = ble_dfu_buttonless_async_svci_init(); APP_ERROR_CHECK(err_code); 9. Compile with debug mode and refer RTT log to modify RAM_START and RAM_SIZE. -- Command for programming app with dfu_buttonless. nrfjprog --eraseall mergehex -m s132_nrf52_7.2.0_softdevice.hex secure_bootloader_ble_s132_pca10040_debug.hex -o SD_BL.hex nrfjprog --program SD_BL.hex --chiperase -r nrfutil settings generate --family NRF52 --application ble_app_uart_pca10040_s132.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 settings.hex mergehex -m ble_app_uart_pca10040_s132.hex settings.hex -o merged.hex nrfjprog --program merged.hex --sectorerase -r Command for u pdating with DFU package nrfjprog --eraseall mergehex -m s132_nrf52_7.2.0_softdevice.hex secure_bootloader_ble_s132_pca10040_debug.hex -o SD_BL.hex nrfjprog --program SD_BL.hex --chiperase -r nrfutil pkg generate --application ble_app_uart_pca10040_s132.hex --application-version 4 --hw-version 52 --sd-req 0x0101 --key-file priv.pem ble_uart_ota.zip Here is the ble_app_uart_buttonless_dfu.zip which I add buttonless_dfu to ble_app_uart. FYI. Regards, Amanda

nRF52 DK Failed to add BLE OTA DFU to the example project ble_app_uart

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