Hi,
I am trying to do DFU OTA. I am using SDK v16.0, s140_nrf52_7.0.1_softdevice.hex, SES and nRF52840 dev kit. I am finished with my application and it functions as expected without OTA firmware update. I am following these tutorials [1] , [2]
- I have created public and private keys with nrfutil 6.0.0(Python 3 version). I have copied the new public key to replace the dfu_public_key.c file already existing at \examples\dfu folder
- For building the bootloader. I have run the \external\micro-ecc\build_all.bat to build all files.
- Loaded \examples\dfu\secure_bootloader\pca10056_s140_ble\ses and compiled(without any edits) in "Release" mode it to generate my bootloader.hex
- I have edited the batch files(which was downloaded from [1]) to load the correct s140 softdevices and created a merged file with Softdevice and bootloader and flashed it on the DK. It works fine by advertising as DfuTarg(I am able to see the device when scanned with another nRF52 dongle-PCA10059)
- I compile my application and generate app.hex
- I run the following to generate the SD+App zip file with my private key
nrfutil pkg generate --application app.hex --application-version 1 --application-version-string "1.0.0" --hw-version 52 --sd-req 0xCA --sd-id 0xCA --softdevice s140_nrf52_7.0.1_softdevice.hex --key-file private.key app_sd.zip
When I try to load the app_sd.zip file to the board via the dongle (via nRFConnect SecureDFU), it doesnt complete and shows the following error
DFU failed with error: When writing 'EXECUTE' command to Control Point Characteristic of DFU Target: Operation code 4 (EXECUTE) failed on DFU Target. Result code 5 (INVALID_OBJECT).
It shows the following log
I have also attached the full log from nRFconnect as well.
I am able to flash the precompiled hex files provided in \examples\dfu\secure_dfu_test_images\ble\nrf52840 (sd_s140_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex) with nrfjprog.exe and upload hrs_application_s140.zip(provided with the examples) to the DK via nRFConnect OTA without a problem.
Can you help me figure out what is causing this upload error in my case?
