Error after updating pluto firmware

Question

I have been using the CN0566 for a phased array radar demo at work and out of the box was working well. I updated the pluto firmware from v0.38 to v0.39 to use the latest code that Jon Kraft has for range doppler plotting and now I am getting an error when I try to run it or any of the other example programs. 
 
 The error is thrown when trying to set the gain control mode on the SDR channels to &lsquo;manual&rsquo;. 
 It is throwing the error from the attribute.py script in /usr/local/lib/python3.9/dist-packages/adi, 
 line 69, in _set_iio_attr channel.attrs[attr_name].value = str(value) 
 AttributeError: &lsquo;NoneType&rsquo; object has no attribute &lsquo;attrs&rsquo; 
 
 I had emailed Jon directly and he suggested that I post here and he thought that it might be that the pluto needs to be updated to allow the dual Rx/Tx mode. 
 
 I tried to ssh into the pluto to check what the "environmental variables" were and whether it was set up as an AD9361 and dual Rx/Tx but the password keeps getting denied. i had never changed the password but I tried editing the config.txt file to reset the password anyway, but that is not solving the issue. 
 
 Any help would be appreciated.

MarkThoren · Answer

Hi JMerry , 
 I just downloaded the new Pluto firmware (rev 0.39). If you just copy the pluto.frm file to Pluto, then the 2T/2R or freq expansion hacks will stay. But if you copy everything from the downloaded firmware zip file, then you&rsquo;ll need to redo the setup commands. You can find those here: 
 https://wiki.analog.com/resources/eval/user-guides/circuits-from-the-lab/cn0566/quickstart#appendixpluto_setup 
 I did Putty into Pluto and the username and password worked for me (username is root, password is analog). 
 -Mark

MarkThoren · Answer

In your original inquiry - were you able to log into the pluto at all? Depending on the SSH client, you may or may not get a prompt for a username. I just tried logging in with PuTTY from Windows, no username given, and I get a prompt for username. I can enter "root" and proceed. However if I run ssh 192.168.2.1 from PowerShell, it attempts to log into the Pluto with my current Windows username and fails. Adding root@ overrides this, and it works fine. 
 Anyway sounds like you're up and running. 
 -Mark

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Error after updating pluto firmware