[noetic] time delay and TypeError

[tkazik]

I am trying to set up a similar scenario as in this issue (laptop & rpi) and till section 2.1 of this guide, everything worked without error. However, when firing up node_manager, I see the following issues:

• There seems to be a time delay of about 10s
• node_manager complains about a TypeError: expected str instance, bytes found

Any hint what I did wrong? Thx a lot

PS: On ubuntu 20.04 with the noetic

[atiderko]

it seems to be an error in node_manager while displaying error. I will fix it... But the error is printed to the terminal: "bash: rosrun: command not found"

Did you put source /opt/ros/noetic/setup.bash before -z "$PS1" ] && return in .bashrc on rpi?

Time delay is nothing that multimaster can fix. You have to synchronize your hosts to avoid problems with ROS. In the meantime you can use the node_manager to set the time once, see http://fkie.github.io/multimaster_fkie/chapter_usage/host_description_panel.html

[tkazik]

Hm, I don't see a line with -z "$PS1" ] && return in my .bashrc, but just added the line source /opt/ros/noetic/setup.bash at the beginning of .bashrc (I also recall that not having that line at the beginning might cause issues).

Now, the errors I get in the log window changed slightly:

[WARN] 19.07.2021 07:46:07.626673 (/node_manager:main_window.py:MainWindow._throttle_nmd_errrors:2370): Error while list_path from grpc://p1g3:12321: 
[WARN] 19.07.2021 07:46:07.626673 (/node_manager:update_thread.py:UpdateThread.run:127): Older master_discovery on http://rpi:11311/ detected. It does not support getUser!
[WARN] 19.07.2021 07:46:08.626673 (/node_manager:main_window.py:MainWindow._throttle_nmd_errrors:2370): Error while get_version from grpc://p1g3:12321: 

[atiderko]

Now the master_discovery on rpi was started, but it is an older version, which does not have implemented getUser method.

About other errors: did you launched node_manager_daemon? If you select rpi on the left the node_manager ask for lauch the daemon. If you have launched the daemon, run it properly or crash it?

[tkazik]

Thx for the fix! Unfortunately, I still get some warnings, even though starting node_manager_daemon explicitly, see:

[atiderko]

Hi @tkazik,

for noetic the debian packets are broken, see issue #144. You have to install multimaster_fkie from github.

[tkazik]

Sorry my bad, I still had the debian packets on the RPi. Thx for your support!