Bootloader update OTA not working (Application OTA is working)

[Karim19]

Hello,

I am tring to do a Bootloader update OTA using the bootlader DFU Dual Bank. Application update OTA is working fine while it is not the case for Bootloader update OTA.

For Bootloader update, I have tried with a Zip file and .bin + .dat files on NRFConnect (Android). In both scenarios, I can see that the file was successfully transferred to the nrf52. However the old bootloader does not get replaced with the new one. I have a led on the boards that tells me which bootloader is active. The leds shows the old boatloader running even that the transfer of the files was successful

SDK Version: 11 Chip: NRF52 softdevice: s132 2.0.0 The files were generated with nrfutil.exe

Application OTA is working perfectly. I just need to replace the bootloader OTA to support the Watchdog.

Any idea why the Bootlader update OTA is not working? and why i am not receiving any error message?

Thank you, Karim

[Karim19]

I just would like to add the following information to my last comment: The products where I want to do a bootloader Update OTA doesn't have yet the Watchdog implemented in its app. So the issue here is a simple uploading of the bootloader OTA which is not working (it has Nothing to do with the watchdog). The Watchdog is simply a feature that I am planning to integrate in the new bootloader to support.