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?

[Kent]

Aha I see. Yes I already tried "nRF Toolbox apps for Android/iOS to perform DFU" and it works fine. Im trying to do the same from a production station "linux/pc" with DFU. So I need one "BLE dongle flashed with the connectivity firmware" connected to the production station, and then use nrfutil to do dfu to the manufactured nrf5 unit. In this case the dongle may be adverticed with "DfuTest" and the other with company name. So I need to create a custum bootloader with another advertice name to test this I guess?.