nRF52840 Buttonless DFU example

[ys parmar]

 I'm trying to test  button less dfu on nrf 52840 dk. i  am simply compile  that hex  ble_app_buttonless_dfu_without_bonds_s140_with_setting_page.h   file with soft device s140 or with out soft device but, 

after that i am off the power device and  power on but  i am not looking ( ble advertise )  "Nordic_Buttonless"  device name . how can we do this ?

[Einar Thorsrud]

Hi,

It is not enough to build and flash the application and SoftDevice. You also need the bootloader, and bootloader settings page. I suggest you start by going through Getting started with Nordic's Secure DFU bootloader, a step by step guide.

[ys parmar]

ok thanks, and when we  DFU Buttonless example at this folder \examples\ble_peripheral\ble_app_buttonless_dfu

 flash the application  with soft device , in  nrf connect  app how we can look dfutrag device name for upload my zip_application folder with soft device and bootloader setting. 

[ys parmar]

when we flash example we are not looking any device name on nrf connect app

[Einar Thorsrud]

Did you also flash the bootlaoder? If you flash just the ble_app_buttonless_dfu example and SoftDevice (and BL settings) but not the bootloader, the bootloader will not run, and also the ble_app_buttonless_dfu  app will hit an error as it checks if a bootlaoder is present. So if you did not flash a bootoader, it is expected that you do not see any advertising. The nRF will simply be stuck in a loop where it starts, detects an error, resets, detect the error, reset, and so on.

[ys parmar]

thanks EINAR for this info, can u suggest me which file to select for flash  the bootlaoder.

[ys parmar]

 i have generated  zip file (application +soft device +boot loader)  after that can you suggest me some step  for  DFU Buttonless example without bond

[Einar Thorsrud]

All the steps are explained in this tutorial

[ys parmar]

Hello Einar ,

as per your suggestion i am doing this so first i flash secure bootloader with sd + ble_app_buttonless_dfu application +bl setting now i am looking ( ble advertise )  "Nordic_Buttonless"  device name. and click dfu and upload hrs_fw.zip . and   ( ble advertise )  "Nordic_HRM"  device name. now my doubt is how we enter again dfu mode for upload new fw.