Overwrite Softdevice by application using Thread Secure DFU

[Nordic DevZone]

Hi everyone,

I would like to overwrite my SoftDevice wchich I don't use in my application. I found information about updates without Softdevice. 

Its possible to update application without SD? I would like to change start app address from 0x26000 (1st application which contains SD) to 0x1000 (after MBR - 2nd app without SD). 

I tried to prepare image pkg with sd-req 0x00

nrfutil pkg generate --hw-version 52 --sd-req 0x00 --application-version 60608 --application app.hex --key-file board_dfu_upgrade_key.pem customer-pkg.zip

I was able to download dfu image but BL didn't activate it.  

Could I overwrite SoftDevice by application via DFU or/and should I update BL too? 

BR

PB

[PBeS]

Hi,

Vidar Berg said:

Are you doing DFU over serial so the bootloaader is not depentent on the Softdevice for receiving the images?

I try to do DFU over Thread.

My old BL has configured sd_req = 0xAE (SD.6.1.0). Should I update BL with sd_req = 0x00 and then try update APP again? 

BR

[Vidar Berg]

I see. And is the bootloader built without BLE support as well (i.e. without BLE_STACK_SUPPORT_REQD flag and BLE dfu transport)