I use SDK15 and S132. I have examples\dfu\secure_bootloader\pca10040_ble loaded in my board. I can see it advertising when there is not valid app loaded.
Also, my app with ble butonless dfu service, when it it loaded together with settings file using nrfjprog -f NRF52 --program settings.hex --sectorerase previously generated by nrfutil, works.
The bootloader settings of my app looks like:
Bootloader DFU Settings:
* File: settings.hex
* Family: nRF52
* Start Address: 0x0007F000
* CRC: 0x83842E94
* Settings Version: 0x00000001 (1)
* App Version: 0x00000001 (1)
* Bootloader Version: 0x00000001 (1)
* Bank Layout: 0x00000000
* Current Bank: 0x00000000
* Application Size: 0x00029930 (170288 bytes)
* Application CRC: 0xFE9E2E33
* Bank0 Bank Code: 0x00000001
* Softdevice Size: 0x00000000 (0 bytes)
* Boot Validation CRC: 0x00000000
* SD Boot Validation Type: 0x00000000 (0)
* App Boot Validation Type: 0x00000000 (0)
I then create update package using nrfutil pkg generate --hw-version 52 --sd-req 0xA8,0xAF,0xB7 --application-version 2 --application nrf5.hex --key-file priv.pem app_dfu_package.zip:
DFU Package: <app_dfu_package.zip>:
|
|- Image count: 1
|
|- Image #0:
|- Type: application
|- Image file: nrf5.bin
|- Init packet file: nrf5.dat
|
|- op_code: INIT
|- signature_type: ECDSA_P256_SHA256
|- signature (little-endian): e2e2bbfc7cfb8e2e7039e8482424e6a1359c40f8f869b36b60ce72735cee14353ac691f0782172248f7da3732159570b4d3363cd3d385fb4e49c2140210613aa
|
|- fw_version: 0x00000002 (2)
|- hw_version 0x00000034 (52)
|- sd_req: 0xA8, 0xB7, 0xAF
|- type: APPLICATION
|- sd_size: 0
|- bl_size: 0
|- app_size: 170208
|
|- hash_type: SHA256
|- hash (little-endian): 67e65daaafc9c59a38e2044c52459ab5f71bdb9298268d43c96df5311d6b55dc
|
|- boot_validation_type: ['VALIDATE_GENERATED_CRC']
|- boot_validation_signature (little-endian): ['']
|
|- is_debug: False
I use nrf Connect v2.6.1 on Windows 10 to run DFU update. It connects to my device with buttonless dfu service and I can initiate dfu update. After a while the update ends with error: ERROR DFU failed with error: When writing 'EXECUTE' command to Control Point Characteristic of DFU Target: Timed out while waiting for response to operation code 4 (EXECUTE).
I can see my device restarts with old app running several seconds before the error is displayed.
This is log from nrf connect: http://mysharegadget.com/744176722
