SoftDevice Upgrade OTA -DFU

[Stevasway]

Hi all,

I need to upgrade an nRF52 device with SoftDevice 5.0.0 and bootloader.

I have to upgrade from SD 5.0.0 to 7.2.0.

I use this command to generate the zip file:

nrfutil pkg generate bootloader+SD7.zip --hw-version 52 --sd-req 0x9D --sd-id 0x0101 --softdevice s132_nrf52_7.2.0_softdevice.hex --bootloader-version 2 --bootloader secure_bootloader_ble_s132_custom.hex --key-file custom_priv.pem

When I program new SD 7 and bootloader using nRFgo Studio everything is ok. When I upgrade by OTA then the device doesn't restart correctly.

What am I doing wrong?

Thanks in advance.

Stevasway

[Einar Thorsrud]

Hi Stevasway,

I assume the bootloader here (secure_bootloader_ble_s132_custom.hex) is built for the SoftDevice you are upgrading to, S132 7.2.0? If so this should work, but the application will be deleted in the process. So the device will enter DFU mode after reset, allowing you do DFU in an application. Is that what happens? If not, what happens when you write that "device doesn't restart correctly"?

Einar

[Stevasway]

Hi Einar,

thanks for your help.
When I program the device with secure_bootloader_ble_s132_custom.hex and SoftDevice 7.2.0 using nRFgo Studio everything works well. So I assume that the firmware is correct.
When I upgrade the device using OTA with zip package generated with nrfutil the upgrade process is ok but when the device restarts something goes wrong.

[Einar Thorsrud]

Hi,

Can you double check that the start address of your old and new bootloader is the same? Have you done any debugging to see if the bootloader is started at all after the DFU? If not, can you do that (toggle a GPIO or something)?

[Stevasway]

Hi Einar,

  I check the start address of the new boolader and I find that was different from the old one. The new started from 0x78000 and the old from 0x75000 (I don't know why).
Anyway I recompiled the bootloader with new address, genereate the zip file (boot+SD7) and update from old SD5 to SD7.
Everything has gone well.

Thank you very much for you support!!!