NRF52840 BLE DFU Issue

[Deep_Kapadia]

I'm facing one issue while uploading firmware using BLE DFU.

Details:-

Hardware : NRF52840-DK

SDK : v15.0.0_a53641a

IDE : Segger Embedded Studio v3.40

Mobile App : nRF Toolbox v2.6.0 (Android)

Example : SDK_15.0.0_a53641a\examples\dfu\secure_bootloader\pca10056_ble_debug\ses 

Using this command in nrfutil to generate zip:

 nrfutil pkg generate --hw-version 52 --application C:\Nordik_Semi\nRF5_SDK_15.0.0_a53641a\examples\peripheral\blinky\hex\blinky_pca10056_mbr.hex --application-version 1111 --sd-req 0xA9,0xAE myapp.zip

I have uploaded above example code using Segger Embedded Studio, LED indications are right (LED1 & LED2 ON normally and LED3 ON while connected using NRF Toolbox). NRF52840 is advertising as "DfuTarg".

But i'm facing an error while uploading. Following is the procedure i have followed In nRF Toolbox app:

DFU -> Select Device -> Selected DfuTarg -> Select File -> Distribution packet(ZIP) -> File selected -> Select Scope(All) -> Upload -> LED3 turns ON -> Uploading -> Starting DFU -> Disconnecting -> Error "Upload Failed:Signature Mismatch".

How can I solve this Issue. 

[Marjeris Romero]

Hi,

You have to change the dfu_public_key.c file use in the example with the public key generated with nrfutil. See this page in the infocenter to how to test the DFU bootloader example, and this page to see how to generate private and public keys.

Best Regards,

Marjeris

[Deep_Kapadia]

Hello,
Thanks!!
Yes. I have updated public key using the above mentioned method and its working now...