ROS Topics and RQT_GRAPH | Tutorial #2 | ROS and Raspberry Pi

[@prandtlmayer]

How do you guys usually get an idea of ROS projects? Do you use rqt_graph? What else?

[@minayakarimova]

Hi, i have a question to you about ROS on lidars, I got the point clouds from lidars and also ros gave me intensity values. Each intensity value matches to a point cloud. How can i use those point clouds? ROS also gave me visualization via rviz

[@messina8933]

Thanks for going through the different commands and showing how to use them. There is quite a lot in ROS and knowing how to view the system is probably the most important step!

[@prandtlmayer]

Keep watching. Next video Saturday

[@jayeshsawant6734]

Very grateful to you Mr. Fiorenzani! We can hardly find good tutorials like these on ROS with RPi.

[@garapatianushadevi3427]

Just awesome! Many thanks for wonderful info for beginners

[@prandtlmayer]

I just released a course just for beginners that gives you all the tools to get started and a certificate: tiziano-school.thinkific.com/courses/school-of-ros-zero-to-ros

[@SimonKlimekNetwork]

in rqt_graph is good to say about dead sinks and leaf topics - these two tickboxes are helpful when you have hundreds of nodes and topics - these two are enabling or disabling topics or nodes which are not publishing or subscribing to anything, all best!

[@prandtlmayer]

Thanks for the comment

[@TejasNarkhede-u6e]

Thankjs a lot!!

[@kishoreduppeti683]

Hi sir, while giving the rqt_graph code, it is showing an error as mentioned "This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb." should I have to reinstall the ROS and all its packages in the Rasp-pi? or is there any alternative method to overcome this error.

[@prandtlmayer]

Where are you trying to run the rqt?

[@kishoreduppeti683]

@@prandtlmayer Thank you for responding sir, I am trying to run rqt graph in the catkin workspace in ros noetic on raspberry pi4.

[@prandtlmayer]

You cannot run it on the pi4. Run it on your Linux machine

[@sainco3036]

Thanks so much.

[@oneknowwhatsup]

Interesting, thanks :)