Hey everyone, thanks a lot for your help. We did as @resam told and upgraded to DSF/RRF 3.4-rc2. This fixed the problem, and we did not need to run sudo pip3 install -U dsf-python.
We also did the change that @achrn provided and set "dwcVersion" and "sbcDsfVersion" simply to "3". Now all of our plugins are working on 3.4 and we are grateful!
Hello @resam.
We tried the example plugin as-is (i.e. no changes except the plugin.json). It looked like this:
{
"id": "FilamentLoadCell",
"name": "Filament Load Cell",
"author": "Thomas Kriechbaumer",
"version": "1.0.0",
"license": "MIT",
"homepage": "https://github.com/Kriechi/duet-plugin-filament-load-cell",
"dwcVersion": "3.4",
"sbcDsfVersion": "3.4",
"sbcRequired": true,
"sbcExecutable": "filament_load_cell.py",
"sbcExecutableArguments": null,
"sbcOutputRedirected": false,
"sbcPermissions": ["registerHttpEndpoints"]
}
The plugin loads partially, and the Python portion does not run. I get the following error:
Mar 07 10:07:11 raspberrypi DuetPluginService[1767]: [error] Plugin FilamentLoadCell: /usr/bin/env: ‘python3’: Permission denied
I change the top line of filament_load_cell.py to #!/usr/bin/python3. This causes the script to run but throws the following error in journalctl:
Mar 07 10:25:06 raspberrypi DuetPluginService[1767]: [error] Plugin FilamentLoadCell: Traceback (most recent call last):
Mar 07 10:25:06 raspberrypi DuetPluginService[1767]: [error] Plugin FilamentLoadCell: File "/opt/dsf/plugins/FilamentLoadCell/dsf/filament_load_cell.py", line 10, in <module>
Mar 07 10:25:06 raspberrypi DuetPluginService[1767]: [error] Plugin FilamentLoadCell: from dsf.commands.basecommands import HttpEndpointType
Mar 07 10:25:06 raspberrypi DuetPluginService[1767]: [error] Plugin FilamentLoadCell: File "/usr/local/lib/python3.7/dist-packages/dsf/__init__.py", line 10, in <module>
Mar 07 10:25:06 raspberrypi DuetPluginService[1767]: [error] Plugin FilamentLoadCell: from . import commands, connections, http, initmessages, models
Mar 07 10:25:06 raspberrypi DuetPluginService[1767]: [error] Plugin FilamentLoadCell: ImportError: cannot import name 'commands' from 'dsf' (/usr/local/lib/python3.7/dist-packages/dsf/__init__.py)
Mar 07 10:25:06 raspberrypi DuetPluginService[1767]: [info] Plugin FilamentLoadCell: Process has been stopped with exit code 1
I'm very much convinced now that something went wrong during upgrading of our Duet version on our Raspberry Pi.
@resam Thanks, I made a sample plugin myself as and others have mentioned, bumped its version number. Here's the demo file I made and tried: https://github.com/Apyron/duet-plugin-workspace/tree/master/plugins/ExamplePythonPlugin
Tomorrow I'll try the sample linked by you, so we can rule out if it's our setup or our plugin. Thanks a lot!
Edit: The 3D printer guy is on vacation, so I can't check today.
Hey there,
Recently I've been playing around with DWC and DSF 3.4.0-rc1, but I couldn't get our Python plugins to work. I also saw the bindings were still made for 3.3: https://github.com/Duet3D/dsf-python
Is this going to be updated soon? Anywhere I can help out? Thanks a lot!
Excuse me to revive this thread, but took a long break after really not being able to fix this in a reasonable amount of time without getting too crazy.
We finally solved it. The solution was:
umount /media/pi/D2F1-AD5Fsudo mount -o rw,umask=0000 -t vfat /dev/sda1 /media/sd.dsf to the users group, but that may not be necessary.The only thing that's left to do is making sure it still auto-mounts, but with the right permissions and configuration.
@mfs12 Thank you! It's not magically faster than using the regular build workflow as laid out by Duet. However, this does automate the majority of the process, so it's faster in terms of human interaction.
Hey there,
As we were building plugins for DWC and DSF we have refined our build/development pipeline.
We decided to make the project open source for others to use.
build_plugin <plugin name> or run_dwc, all you have to do is drop the plugins of choice in a folder and they automatically get recognized and you can test/build them)Currently, it works with a forked version of DWC 3.3, the only addition is the plugin build script of Duet 3.4 being included in 3.3. This way we can support DWC 3.3 and immediately be ready for DWC 3.4 without having to change anything in our workflow!
Let me know what you think! The project is here: https://github.com/Apyron/duet-plugin-workspace
@chrishamm Hi there
dsf@raspberrypi:/home/pi$ cd /media/sd
bash: cd: /media/sd: Permission denied
It indeed seems to break when trying to access the folder. I'm currently in the process of finding out what happened and how to fix this error.
@chrishamm said in SBC USB printing:
@peterwilli Does it help to reload DWC once it's mounted? What does
http://duet3/machine/directory/2:/
output when the drive is mounted? You may have to replace duet3 with the name or IP address of your printer.
Hi there,
With the link + mounting the drive manually for dsf we get the following error:
@chrishamm Hey there, thanks for replying.
I work with @semi55 in the team, so I'm replying on behalf of both of us.
Our current image runs the desktop version with DuetPi installed. The desktop is logged in as "pi" but "dsf" is used in the background.
I have unmounted the drive in question and ran the following commands to test this theory:
sudo umount D2F1-AD5Fsudo mount -o umask=777,gid=996,uid=996 /dev/sda1 /media/sd996 is the GID/UID of "dsf".
We now get a different error where I don't know anymore what the answer to that would be:
Thanks a lot in advance
@jay_s_uk Thank you, we tried it and it works. We'll wait for the "real" release coming out and upgrade to this version!
Hey there,
A while ago I asked help for developing a plugin, and I managed to do that. It runs on the printer and is based on the following plugin: https://github.com/Kriechi/duet-plugin-filament-load-cell
The problem we're facing now is that when the printer (the raspberry pi) is restarted, the plugins are listed as "partially started", with no errors in journalctl. When manually stopping/starting said plugins it works fine.
I wonder if this is a common problem? We tried both the filament load cell plugin (We based our plugin on this source, but found no other plugin with Python to test out) and our own.
We're currently on DWC 3.3.0. Thanks a lot!
@mfs12 Thanks a lot I will update this later in our image builder so it gets the latest version.
Edit 2: (New post becuase I'm not allowed to edit posts anymore)
I managed to get past the first error by running pip3 install dsf, but now I get the second error, and I have no idea what random_UA really is...
pi@raspberrypi:~ $ systemctl status duetpluginservice.service
● duetpluginservice.service - Duet Plugin Service
Loaded: loaded (/lib/systemd/system/duetpluginservice.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2021-07-27 16:17:14 BST; 1h 4min ago
Main PID: 919 (DuetPluginServi)
Tasks: 15 (limit: 4915)
CGroup: /system.slice/duetpluginservice.service
└─919 /opt/dsf/bin/DuetPluginService
Jul 27 17:18:38 raspberrypi DuetPluginService[919]: [error] Plugin FilamentLoadCell: ModuleNotFoundError: No module named 'random_UA'
Jul 27 17:18:38 raspberrypi DuetPluginService[919]: [info] Plugin FilamentLoadCell: Process has been stopped with exit code 1
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [info] Plugin FilamentLoadCell: Process has been started (pid 1586)
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [error] Plugin FilamentLoadCell: Traceback (most recent call last):
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [error] Plugin FilamentLoadCell: File "/opt/dsf/plugins/FilamentLoadCell/dsf/filam
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [error] Plugin FilamentLoadCell: from dsf.commands.basecommands import HttpEndpo
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [error] Plugin FilamentLoadCell: File "/usr/local/lib/python3.7/dist-packages/dsf/
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [error] Plugin FilamentLoadCell: import random_UA
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [error] Plugin FilamentLoadCell: ModuleNotFoundError: No module named 'random_UA'
Jul 27 17:21:38 raspberrypi DuetPluginService[919]: [info] Plugin FilamentLoadCell: Process has been stopped with exit code 1
I love Duet 
Edit 3: I managed to get past the dsf error, apparently I installed the wrong DSF, I need to install like this: sudo pip3 install dsf-python (Mind the use of sudo! I tried it without first by accident which caused it not to work).
However, it seems to fail to start the exposed command API.
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: Traceback (most recent call last):
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: File "/opt/dsf/plugins/FilamentLoadCell/dsf/filament_load_cell.py", line 61, in add_dsf_http_endpoint
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: cmd_connection.connect()
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: File "/usr/local/lib/python3.7/dist-packages/dsf/connections.py", line 425, in connect
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: return super().connect(clientinitmessages.command_init_message(), socket_file)
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: File "/usr/local/lib/python3.7/dist-packages/dsf/connections.py", line 66, in connect
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: self.socket.connect(socket_file)
Jul 27 18:04:03 raspberrypi DuetPluginService[2417]: [error] Plugin FilamentLoadCell: FileNotFoundError: [Errno 2] No such file or directory
So now the only error that is left is the problem with the apparmor that I disabled for now and this Python thingy...
I'll keep looking myself too! Thanks a lot!
Edit 4: I managed to run the Python portion! The trick was: git clone https://github.com/Duet3D/dsf-python and then cd to that directory, then run sudo mkdir -p /usr/local/lib/python3.7/dist-packages/ and then run sudo python3 setup.py install
I guess that there's a problem with the latest release which is fixed in the github repo...
@resam Hi there, I managed to connect to our printer so I could test it out.
The DWC says "partially started", and it seems the python portion does not want to load.
I checked dmesg and it seems that Apparmor is blocking the execution of the script:
[ 9345.841913] audit: type=1400 audit(1627397274.769:95): apparmor="DENIED" operation="exec" profile="/opt/dsf/plugins/FilamentLoadCell/**" name="/usr/bin/python3.7" pid=3055 comm="filament_load_c" requested_mask="x" denied_mask="x" fsuid=996 ouid=0
[ 9345.842277] audit: type=1400 audit(1627397274.769:96): apparmor="DENIED" operation="exec" profile="/opt/dsf/plugins/FilamentLoadCell/**" name="/usr/bin/python3.7" pid=3055 comm="filament_load_c" requested_mask="x" denied_mask="x" fsuid=996 ouid=0
I wondered if others had this problem too with Python scripts?
Edit: I deleted the Apparmor profiles to see what would happen. I still seem not to be able to run it entirely, wouldn't the DSF module be loaded by default? Btw, the DWC portion works fine.
● duetpluginservice.service - Duet Plugin Service
Loaded: loaded (/lib/systemd/system/duetpluginservice.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2021-07-27 16:10:49 BST; 6min ago
Main PID: 3634 (DuetPluginServi)
Tasks: 14 (limit: 4915)
CGroup: /system.slice/duetpluginservice.service
└─3634 /opt/dsf/bin/DuetPluginService
Jul 27 16:16:53 raspberrypi DuetPluginService[3634]: [info] Plugin FilamentLoadCell: Process has been started (pid 3760)
Jul 27 16:16:53 raspberrypi DuetPluginService[3634]: [error] Plugin FilamentLoadCell: Traceback (most recent call last):
Jul 27 16:16:53 raspberrypi DuetPluginService[3634]: [error] Plugin FilamentLoadCell: File "/opt/dsf/plugins/FilamentLoadCell/dsf/filament_load_cell.py", line 10, in <module>
Jul 27 16:16:53 raspberrypi DuetPluginService[3634]: [error] Plugin FilamentLoadCell: from dsf.commands.basecommands import HttpEndpointType
Jul 27 16:16:53 raspberrypi DuetPluginService[3634]: [error] Plugin FilamentLoadCell: ModuleNotFoundError: No module named 'dsf'
Jul 27 16:16:53 raspberrypi DuetPluginService[3634]: [info] Plugin FilamentLoadCell: Process has been stopped with exit code 1
Thanks everyone for their replies! Currently I found a rather magical way to try things out: I made a sort of VPN with the printer (at another location) with my PC. I used my own SSH port forwarding tool for this (https://github.com/peterwilli/Ghoster) and so far I can open DWC and install plugins as if the printer is in my own home!
Hey there,
I'm currently around 25% with my DSF plugin. My colleague has the 3D printer, but we meet up next month, and I was hoping I could test out at least the plugins before testing it out, so that I could at least iron out any issues that have nothing to do with the printer (i.e, my plugin has a database, and I'd like to test that out).
Is there any way you can test plugins without a printer or duet board (knowing that printer functions obviously don't work).
I'm using DSF-python (https://github.com/Duet3D/dsf-python/) and can use a Raspberry Pi, if that helps. Thanks a lot in advance!
What i'd like to test:
What I've tried myself:
@resam Thank you that is very helpful. I already managed to get the GUI portion working by making my own DWC plugin. I'm now looking at the way the DSF sdk works. Your link really has a good example.
@resam Thanks a lot. I will try python, that's what I'm most familiar with!
Hi there,
Currently I stumbled upon this README: https://github.com/Duet3D/DuetSoftwareFramework/blob/master/PLUGINS.md#zip-file-structure
It talks about the structure of DSF plugins in their zip file.
In my plugin, I need to be able to check if a print has been ended (a message g-code will be sent).
I have to make sure that I can catch this event, even if DWC is not open on the user side, and I don't know if I understood correctly but there is a section that reads "dsf/ directory: Contains executable and config files for the SBC portion (if applicable)" and I was thinking that's where I put an executable that can listen for events over say a socket interface, if I understand it correctly.
Please correct me if I'm wrong, I may have mistaken myself entirely here. In any case, I can't find an example plugin that uses this dsf/ folder, so I cannot tell for sure.
If anyone has more info on this, that'd be much appreciated!