The nRF52832 chip and SDK12.3.0 implement the buttonless DFU function.

Question

The nRF52832 chip and SDK12.3.0 implement the buttonless DFU function. 
 First, as you are guided by the DK board, you have already completed the tutorial. 
 I tried to run it in the source of my project, My project device is stopped during the initial setup of the application and it seems to run in bootloader mode. 
 
 In my project, I did not call the bootloader mode setting function, but only added the header file and C file. 
 I want to know the exact reason for this and how to solve it. 
 Why do I enter this mode when I did not call the bootloader mode function? 
 
 bootloader mode is running but not advertising. I'm guessing now that my device's state is bootloader mode, but I'm not sure.

Softdevice & firmware all delete picture 
 
 Softdevice & My DFU Project Downloaded on Chip

Help me...Thank you very much.

Marjeris Romero · Accepted Answer

Hi, 
 Which version of the nRF toolbox app are you using? 
 You can try to see if the process works using nRF Connect app. 
 But I don't think app is the issue. 
 
 Aser said: No matter how I look for nrf52832_xxaa.hex, the file does not exist. There is only nrf52832_xxaa_s132.hex instead. 
 Did you build the example using Keil? What is the location (path) of nRF52832_xxaa_s132.hex? 
 Before the DFU: the device (dfu targ) should be flashed with bootloader + softdevice: 
 1. The bootloader located in \examples\dfu\bootloader_secure\ 
 2. Own generated private and public key should be located in examples\dfu\bootloader_secure\ 
 3. Replace 'dfu_public_key.c' with your own public key. 
 4.Open the project \examples\dfu\bootloader_secure\pca10040\arm5_no_packs\secure_dfu_secure_dfu_ble_s132_pca10040.uvprojx in Keil 
 5.Build the bootloader with Keil 
 6. Flash bootloader and softdevice. 
 6.1 Erase the device 
 nrfjprog --eraseall 
 6.2 Program softdevice, located in components\softdevice\s132\hex\ 
 nrfjprog -f NRF52 --program s132_nrf52_3.0.0_softdevice.hex 
 6.3 Program the bootloader, located in \examples\dfu\bootloader_secure\pca10040\arm5_no_packs\_build
rf52832_xxaa_s132.hex 
 nrfjprog -f NRF52 --program nrf52832_xxaa_s132.hex --verify --reset 
 7. Verify that the bootloader starts advertising as "DFUTarg" in nRFConnect app/ nRFtoolbox app . 
 I recommend you read Step A, B, C and D again in this tutorial . 
 Best regards, 
 Marjeris

The nRF52832 chip and SDK12.3.0 implement the buttonless DFU function.

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