Unable to perform DFU over serial and USB-serial

[Krupashankar]

I am using RIGADO Evaluation Board 320-00050 

I am using nrfutil v5.2.0 to perform DFU i am able to create DFU package and when sending the package i am facing problems

When i performed DFU over a serial UART connection i get following error:

raise NordicSemiException('Writing to serial port failed: ' + str(e) + '. '
pc_ble_driver_py.exceptions.NordicSemiException: Writing to serial port failed: WriteFile failed (WindowsError(5, 'Access is denied.')). If MSD is enabled on the target device, try to disable it ref. https://wiki.segger.com/index.php?title=J-Link-OB_SAM3U

i have disabled MSD also even then i get this error

When i performed DFU over a serial USB connection  i get following error:

self.mtu = struct.unpack('<H', bytearray(response))[0]
TypeError: 'NoneType' object is not iterable

Please help me out to perform DFU

Thanks,

Krupa

[bjorn-spockeli]

HI Krupa, 

are you running the Command Promt as administrator? 

Best regards

Bjørn

[Krupashankar]

Hi Bjørn,

Yes i am using command prompt as administrator and i have tried without administrator also both didn't work

Thanks,

Krupa

[bjorn-spockeli]

Ok, the MSD issue appears to be specific to Mac OS X. Which OS are you running on the machine you'r running nrfutil on?

[Krupashankar]

i am using Windows 10 

[bjorn-spockeli]

Ok, pleas post the nrfutil command you're using to initiate the DFU procedure. Does the board enumerate as a COM port when you open the "Device Manager" in Win 10?

[Krupashankar]

Command used: nrfutil dfu  serial -pkg app_dfu_package_2.zip -p COM3 -b 115200

Yes device is connected and enumerated as com port 3