nrfutil dfu ble failed to open Win 10

[Kent]

I try to load my nRF52 with app via ble from windows 10 laptop.

nRF52 dev kit is loaded with the Softdevice and Bootloader from nRF5_SDK_12.1.0\examples\dfu\ble_dfu_send_hex\test_images_update_nrf52.

I have no problems to load nRF52 dfu_test_app_hrm_s132.zip from Mobile nRF Toolbox.

I try to do as admin:

"nrfutil dfu ble -ic NRF52 -n "DfuTest" -p COM5 -pkg dfu_test_app_hrm_s132.zip"

from windows 10 python2.7.12(nrfutil2.0.0/pc_ble_driver_py0.8.0) only version installed.

but get open failed exception (access denied):

"C:\Python27\lib\site-packages\pc_ble_driver_py\ble_driver.py", line 126, in wrapper raise NordicSemiException('Failed to {}. Error code: {}'.format(wrapped.name, err_code)) pc_ble_driver_py.exceptions.NordicSemiException: Failed to open. Error code: 13

I can see nRF52 device "DfuTest" in win bluetooth device list.

Any ideas?

[bjorn-spockeli]

Hi Kent, you edited the comment before I managed to answer. You wrote

"... in order to use it to perform DFU over BLE on another nRF5x device." Do I need two separate units? I only have one nRF52DK that I laborate with.

Yes, you need two separate units if you want to use the pc-ble-driver to perform DFU. One that is used as a BLE dongle flashed with the connectivity firmware that communicates with the pc-ble-driver on your computer. The second unit is the nRF52 device that runs your application, bootloader and SoftDevice. Since you only have one unit, then I recommend that you use our nRF Connect or nRF Toolbox apps for Android/iOS to perform DFU instead.