DFU

[harrys]

Hi, 

i am working on nrf52dk. i have already implemented dfu with button. i want to implement buttonless dfu. as there is a example provided in ble_peripheral with name  "ble_app_dfu_buttonless".

when i program  "ble_app_dfu_buttonless" example .nrf52dk starts advertising as "Nordic_buttonless". when i connect it with nrf connect app it does not show dfu icon.

[Amanda Hsieh]

Hi, 

Do you see the DFU icon as the following figure?

-Amanda H.

[harrys]

yes i find it with precompiled examples . there is a example in ble_peripheral  "ble_app_dfu_buttonless". when i program that example it doesnot advertise anything . 

is there any step i am missing.

[Amanda Hsieh]

Hi,

Do you follow the nRF52832-buttonless-dfu-development-tutorial? You also need to program the SoftDevice and bootloader to run the ble_app_dfu_buttonless. See the following flow:

mergehex -m s132_softdevice.hex secure_bootloader_ble_s132_pca10040_debug.hex -o merged_SD_bootloader.hex
nrfjprog --program merged_SD_bootloader.hex --chiperase -r
nrfutil settings generate --family NRF52 --application ble_app_dfu_buttonless.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 settings.hex
mergehex -m ble_app_dfu_buttonless.hex settings.hex -o merged.hex
nrfjprog --program merged.hex --sectorerase

-Amanda H.

[harrys]

yes i am doing same

[harrys]

yes it is working. i was doing it with "secure_bootloader_ble_s132_pca10040.hex" by compiling "pca10040_s132_ble"  not with debug.

i want to use key in it. when i am doing it with key. then it is not working

[Amanda Hsieh]

You need to create a private key for the secure_bootloader example. See BLE Secure DFU Bootloader and Working with keys for instructions.