SDK12 DFU service not found

[jpolvi]

I am developing software for a custom hardware based on NRF52. Previously I was tasked on updating the old NRF51 based software (used on older version of the device) for NRF52 using SDK11. Once that was done my next task was updating the software for SDK12. The software is otherwise working fine but I am having problems with DFU. I tried creating a zip of the application and flashed the combined softdevice/bootloader from SDK12 examples folder (dfu/ble_dfu_send_hex) to the device. The device shows as DfuTest on the mobile DFU app but when I try to upload the zip all I get is "DFU service not found". I also tried compiling the secure DFU bootloader example and using that instead but the result is the same.

Do I need to also have DFU support in the application for that to work ? Currently the application has some kind of DFU functionality from the earlier SDK 11 implementation but I'm guessing that wont work. Any examples to study so that I can implement the functionality ?

[jpolvi]

I think I am doing the initialisation wrong. Currently the application is only calling the function ble_dfu_init in ble_dfu.c (this is how it was done in the SDK 11 version) using following init settings:

dfus_init.evt_handler = ble_dfu_event_handler; dfus_init.ctrl_point_security_req_write_perm = SEC_SIGNED; dfus_init.ctrl_point_security_req_cccd_write_perm = SEC_SIGNED;

However, when I compared the implementation of this function under SDK 11 and SDK 12 I noticed that the SDK 11 version is doing a lot more initialisations than the SDK 12 version. OTOH the init function with the same name (but different params) in nrf_ble_dfu.c seems to do about the same as the other function. Perhaps I should be using that instead ?