[DFU] CRC does not match! error

[SK]

Hello, 

Background: 

I am using nRF52832 with SDK 15.3, SES v4.12. I want to perform OTA updates on the application i am building but i am having issues with it. I was using SDK 14.2 before migrating to 15.3 and till then OTA was working fine, no issues.

I am using 2 VS UUID ( one - NUS and the other Buttonless service) and i have made the necessary changes to both the application and the bootloader.

Problem:

During the time of firmware update, there is a CRC does not match error which is reported by nRF connect (using v4.24). nRF util version that i am using is v5.20.

DFU_LOG.pdf

Attached is DFU log from nRF connect. Could you please let me know where i am going wrong with this? Please let me know if you require more information. 

UPDATE:

I have used nrfjprog directly to burn image (BL+SD+APP) on the custom board itself and it was working fine. To test the OTA update, i created the zip of the same image and tried DFU which is where it failed with CRC error.  

Thanks a lot! 

-SK 

[Aleksander Nowakowski]

Hello!

I have found the issue in the latest version. I put * instead of & at one place. Because of this one character the DFU parsing fails.

I'll release an update in next 5 minutes which should be available soon on Google Play. Sorry for the trouble!

[Aleksander Nowakowski]

The update is already ready for you to test here: github.com/.../version_4.24.1

[SK]

Hi Aleksander Nowakowski, 

Thank you. With this new release, CRC issue is fixed. :) 

But after the update, when i connect back again, i can only see Secure DFU service :( Since i am using 2 VS UUID's, i was hoping to see the other one too, which is, NUS service. 

Would you know anything on where i am going wrong here?

Service changed is enabled in both bootloader and the application.  

[SK]

Hi, 

I created a new ticket for above issue here - https://devzone.nordicsemi.com/f/nordic-q-a/55705/application-service-uuid-gone-after-secure-ota-dfu