RE: SDK12.2 DFU OTA application doesn't start

Mathias Vandel — Thu, 23 Feb 2017 13:49:53 GMT

Thanks Bjørn. I generated a new firmware .zip package and suddenly it worked. So i must have made a mistake when generating it the first time.

RE: SDK12.2 DFU OTA application doesn't start

bjorn-spockeli — Wed, 22 Feb 2017 12:55:11 GMT

Hi Mathias, when you say transfer, do you mean flashed the application or DFU'ed the application. If its the latter, then what version numbers did you set when you created the .zip package for the ble_app_proximity example? Have you checked that they are in compliance with the acceptance rules of the bootloader, found here. If they are, then I suggest that you run the bootloader in a debug session and check if you reach

nrf_bootloader_app_start(MAIN_APPLICATION_START_ADDR);

in nrf_dfu_init() in nrf_dfu.c. You can also try to read the bank 1 code at 0x7F020 using nrfjprog -f nrf52 --memrd 0x7F020, which should be set to 0x01 indicating that there is a valid application.