Failed to send init packet, nrfutil dfu serial

[David]

when i run sudo nrfutil dfu serial -pkg my_package.zip -p/dev/ttyACM0 i get the following error: pc_ble_driver_py.exceptions.NordicSemiException: Failed to send init packet.

I am running this on an UpBoard with Ubuntu 16.04. I created a VM running the same OS (Ubuntu 16.04) and the nrfutil dfu works over serial and ble. just not on the UpBoard.

Can anyone help me with this issue?

EDIT: Here is what i have tried so far:

nrfutil dfu serial -pkg my_package.zip -p COM3 on my PC (Windows 10) it works!

sudo nrfutil dfu serial -pkg my_package.zip -p/dev/ttyACM0 on VM (Ubuntu 16.04.1) running on my PC it works!

nrfutil dfu serial -pkg my_package.zip -p COM3 on UP Board (Windows 10) it works!

sudo nrfutil dfu serial -pkg my_package.zip -p/dev/ttyACM0 on UP Board (Ubuntu 16.04.1) Does not work!!

FURTHER EDIT:

I have tried installing Windows 10 onto an UP Board and running a VM on top with Ubuntu 16.04.1 and the nrfutil dfu works fine!?

It seems to me that a bare metal install of Ubuntu 16.04 is not supported by the nrfutil is this correct? or can someone please prove me wrong?

I have also recently discovered that nrfutil dfu works fine running ubilinux OS (another debian flavour supplied by the UP Board Community).

I am still interested in finding out why a bare metal install of ubuntu is not compatiable with the nrfutil... Has this been done before? and if so how?

any help or suggestions is appreciated thanks :)

[bjorn-spockeli]

Are you only seeing issues with the serial bootloader on the UpBoard or both BLE and serial? How are you connecting the nRF52 device to the UpBoard, just TX and RX or TX, RX, CTS and RTS?

[David]

I am having issues with both Serial and BLE on the UpBoard, i put some logs in the dfu_transport_serial.py and it looks like it is failing on the CRC validation, the CRC from the response is incorrect. i don't know why this would be happening? do you have any ideas, i used the same package on a Virtual Machine Ubuntu and it works fine. i am currently using a dev board connected via USB

[bjorn-spockeli]

By dev board you mean the nRF52 DK? Are you able to provide a logic trace of the of the UART line between the UpBoard and the nRF52`?

[David]

I am using a NRF52 DK yes, connected via USB to my UP Board

[bjorn-spockeli]

It could be an issue with the HWFC. You could try to disable it in the serial bootloader project and in the nrfutil source as described in this answer.