DFU

[harrys]

Hi, 

i am working on nrf52dk . i want to do DFU with BLE can you provide any document link. 

[Amanda Hsieh]

Hi, 

Check out https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader 

-Amanda H.

[harrys]

i have merged the two hex files "secure bootloader dfu example code" and "softdevice_hex file". programmed it in nrf52dk.

now nrf52dk is advertising "dfuTarg". when i program the device (blinky_ble_code) with nrf mobile app. programming done but nrf52dk is still advertising "dfuTarg".

[harrys]

i have not merged softdevice hex file and secure bootloader dfu debug.hex  in debug example .

i directly programmed it with SEGGER EMBEDDED STUDIO. and then programmed blinky.zip file with mobile app. and it works.

[Amanda Hsieh]

Hi, 

The segger will load the softdevice hex before programming the secure_bootloader_ble_s112_pca10040_debug if you check the log. That is the same as you did merge and program. You could press "build and run" in the segger for pca10040_s132_ble. It did the same thing. 

-Amanda H.

[harrys]

yes it works. thank you

[harrys]

can  you tell me how i  can do the same with ble_buttonless_dfu example. 

[Amanda Hsieh]

In your command, modfiy "ble_app_blinky_pca10040_s132.hex" to ble_buttonless_dfu image. Also see nRF52832-buttonless-dfu-development-tutorial 

-Amanda H.

[harrys]

i did buttonless_dfu code in nrf52dk .what happened it advertise "NORDIC_BUTTONLESS" and then i did another code with mobile app. how to get back to dfu mode

[Amanda Hsieh]

Holding Button 4 on the nRF52DK during startup makes the device enter DFU mode.

-Amanda H.

[harrys]

but i am working on buttonless_dfu.

[Amanda Hsieh]

I think you are using BLE Secure DFU Bootloader and buttonless_dfu, so the bootloader supports that Button assignment. See BLE Secure DFU Bootloader-Button assignment. 

-Amanda H.

[harrys]

i was looking for something that doesnot include button