nrfutil_v6.1.0 should use connectivity firmware v4.1.2 for usb dongle

[xiaoshideyuxiang]

nrfutil_v6.1.0 should use connectivity firmware v4.1.2(fixed some fatal bug)

https://github.com/NordicSemiconductor/pc-nrfutil/blame/v6.1/nordicsemi/__main__.py#L1177

connectivity_firmware = os.path.join( os.path.dirname(config.__file__), "hex", "sd_api_v5", "connectivity_4.1.1_usb_with_s132_5.1.0_dfu_pkg.zip" )

after manual change code to

connectivity_firmware = os.path.join( os.path.dirname(config.__file__), "hex", "sd_api_v5", "connectivity_4.1.2_usb_with_s132_5.1.0_dfu_pkg.zip" )

Test nrfutil with PCA10059 usb dongle, download connectivity firmware successful(via cmd "nrfutil dfu ble ...-f")

However there are still some errors when i try to use it to dfu a target board(pca10040), will rise Exception:("Failure-Connection failed due to 0x3e")

[bihanssen]

@xiaoshideyuxiang, nrfutil will in next release be updated to point to the latest ble-driver-py, v0.15.0. which carries the 4.1.2 firmware.
I am not sure why you are receving the 0x3e error though, I don't suspect that is related to the firmware version. You can lookup articles on 0x3e on devzone for more info on that error message.