How can I make image files for DFU?

[roger.k]

Hi. I'm using nRF51822, SDK12.2.0, S130. I finally compiled bootloader_secure which was very hard.

Q1. After run bootloader, I can find the device using DFU "DfuTarg" on my smartphone installed "nRF Toolbox". So I can choose my device using "SELECT DEVICE" button. Then I selected file being demo app such as "blinky_s132.zip". And I started upload, but there was no complete message even though I could see Bluetooth was connected. After that connection was disconnected. How can I test DFU using demo app?

Q2. From now on I'm gonna make image file. But it's very difficult to understand. Can you let me know how to make image files?

Q3. As I've made bootloader, I made PK. I think it is for when I make image files. How to put PK into image files? If not, when do I use this key?

I need your help.

[bjorn-spockeli]

Hi Roger,

A1: You can test the Secure Bootloader by using the test images found in the examples\dfu\ble_dfu_send_hex\test_images_update_nrf51 folder.

A2: You have you use our nrfutil tool, found here on our GitHub, to generate firmware images. The instructions on how to use nrfutil are provided on the GitHub page.

A3: Instructions on how to sign firmware images with the private key is given on the GitHub page linked to in A2.

Best regards

Bjørn

[roger.k]

Thank you so much for your help.