Using nrfutil on Ubuntu with symlinks to usb ports

[KRichardson846]

Hello,

I am trying to use multiple Nordic USB dongles to perform multiple DFUs simultaneously. I've found with the help of Nordic FAEs and through some testing that spreading the dongles out away from each other and getting them as close to the target device as possible was the best way to do this. So in order to make sure each dongle will always be as close as possible to its target device I've modified my udev rules on my system to pay attention to certain ports, and when a Nordic device is plugged into one, to make a symlink with the name locX where X is a number from 0 - 9 depending on which port it is.

Unfortunately running nrfutil with the argument for port being "-p /dev/loc4" causes the program to say that no board can be found. If I use the normal port that symlink is pointing to (/dev/ttyACM5) then it works just fine. Does nrfutil allow the use of symlinks like I'm trying here?

[Håkon Alseth]

Hi,

  

Does nrfutil allow the use of symlinks like I'm trying here?

 I tested this by symlinking /dev/ttyACM0 -> /dev/test, and I got the same behavior. It does not allow symlinking a dev.

A workaround is to pipe in using readlink:

nrfutil dfu ble -pkg dfu_test_2.zip -ic NRF52 -p $(readlink /dev/test) -f -n "Nordic_Buttonless"

 

Kind regards,

Håkon

[KRichardson846]

Thank you for confirming this. I've found a way around it with my python code as well.

import os

port = os.path.realpath('/dev/test')

This allows me to pass the port into a python sub process call to nrfutil.