DFU Update from SDK 12.2 to SDK 13.0

Question

As Bootloader IROM starting address 0x78000 and size 0x6000 is same in SDK 13.0 and 12.2.0 expecting to update Device firmware (BL+SD+APP) from 12.2.0 to 13.0.0 SDK.But in my case DFU update (secure BL+SD+APP) or DFU Update (secure BL+SD) from 12.02 to 13.0 is failing even though private keys are same.` 
 Also tested DFU updates are working for without issues from 12.0.2 to 12.0.2 and 13.0 to 13.0 without any issues.

Srikar · Accepted Answer

Hello,
Able to update but need to 
 
 Create DFU distribution package first without APP only BL+SD of SDK 13.0 with --sd-req =0x91 instead of 0x98 in nrfutil pkg generate options 
 Update Device firmware from 12.2.0 with package generate in step 1 
 Create a Distribution package containing App only now --sd-req =0x98 . 
 Update Device firmware App with step 3 distribution package 
 
 Note:- BL version with incremented and App version can same or incremented version as per nordic documentation 
 Not sure why -sd-req should have same version which is on device expected it should be sd version in package someone from nordic can provide more information

DFU Update from SDK 12.2 to SDK 13.0

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