Secure DFU Issue

[Murugan]

Dear Nordic Team,

Thanks for supporting.

Now i am work with secure dfu using SDK12.3.0.

My Hardware :PCA10028 nrfutil version 3.1.0

Create Zip file like : nrfutil pkg generate --hw-version 51 --sd-req 0x80 --application-version 4 --application app.hex --key-file key.pem app_dfu_package.zip

1. Initially load secure_dfu_secure_dfu_ble_s130_pca10028_debug.hex through nrfgo studio
2. Advertising shows DfuTarg
3. Then try to upload zip file through nrf mobile app showing error like, Upload Failed:UNKNOWN(8202)

I dont know what i am doing wrong . Please help anyone.

[nemunoz]

Hi Murugan.

How are you uploading the zip file?

There are two apps (as far as I know) which can do the DFU proccess:

• nRF Toolbox

• nRF Connect

If you are using nRF Connect, after pressing the button CONNECT on DfuTarg, you will have a very little button on the right of DISCONNECT. That button has two arrows and the three letters "DFU" and you have to upload your zip file through there.

I hope this will be helpful, because the command you wrote looks good (I don't have any nRF51 board to check the versions of SoftDevice and SDKs).