Q: tf tutorial is displaying just one turtle instead of two A: My guess is that you forgot to add the listener node tag to the launch file. Forum question: https://answers.ros.org/question/280412/tf-tutorial-is-displaying-just-one-turtle-instead-of-two/ RDS:...
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[ROS Q&A] 100 – ROS Development Studio Howto #1
In this video, the first of a series, we are going to show how to build, debug, test and train, ROS programs by using the ROS Development Studio environment. This video shows: 1- How to create a new ROS project and how to open it for development 2- How to create your...
[ROS Q&A] 099 – How can I represent a snake robot with many identical segmens in SDF #Part2
Second part where you will learn how to use SDF Ruby Macros, with a totally parametrised model making infinite number of elements:...
ROS 2 vs. ROS 1 : Which One Is Better For Me?
If you want to learn more about the differences betwwen ROS 1 and ROS 2, you can find more information on the links below: Thomas, D. Changes between ROS 1 and ROS 2. Gerkey, B. Why ROS 2.0? If you want to start learning ROS 1, you can learn through the following...
[ROS Q&A] 098 – How to see if my ROS Publisher works using ROS Unit Testing
In this video we show how we can see if a ROS Node that we have developed is publishing on a ROS Topic as expected. To check this we use "rostest.rosrun" and "unittest.TestCase" https://youtu.be/XEvAoRmdv_Q
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![[ROS Q&A] 101 – TF Tutorial – Problem to display second turtle](https://www.theconstruct.ai/wp-content/uploads/2018/01/TF-Tutorial-Problem-to-display-second-turtle-screen.png)
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![[ROS Q&A] 099 – How can I represent a snake robot with many identical segmens in SDF #Part2](https://www.theconstruct.ai/wp-content/uploads/2018/01/Part2-How-can-I-represent-a-snake-robot-with-many-identical-segmens-in-SDF-screen.png)

![[ROS Q&A] 098 – How to see if my ROS Publisher works using ROS Unit Testing](https://www.theconstruct.ai/wp-content/uploads/2018/01/How-to-see-if-my-ROS-Publisher-works-using-ROS-Unit-Testing-screen.png)
