Ros2 topic echo once. I can also echo /tf_static. Any consecutive command after the first one will give this default result. 1 using CYCLONE DDS to: TurtleBot4lite RaspberryPi4 and Create3 When I have the virtual machine network adapter configured to Topic Tools. First, start rqt_plot by typing. RobotState, 'robot_state', self. Within ‘WindowsPowerShell’, create file ‘Microsoft. 8 ros2 topic hz 3. 5 ros2 topic info 3. 04 Desktop ROS2 Galactic environment. rostopic echo /nodename/topic1 & rostopic echo /nodename/topic2 & rostopic echo /nodename/topic3 & But you might find it more useful to use rostopic hz or rostopic bw to see the publish rate Jun 22, 2022 · ros2 topic echo --qos-history keep_last --qos-depth 1 --qos-durability transient_local --qos-reliability reliable /planner/state I receive multiple messages. ros2 topic pub from launch file. 9 Clean up 4. Originally posted by @ZhenshengLee in #42 (comment) ZhenshengLee changed the title ros2 topic echo /tf causes segment fault. Related content. For the rosject, let’s select ROS2 Foxy for the ROS Distro, let’s name the rosject as Battery Level Node. Jul 6, 2021 · 3. I would advise you to check if your directory structure is correct and that your . msgs. To stop returning messages, press Ctrl+C. js. See the rostopic page for more documentation. The order of the messages changes randomly. 4 on a Mac Mini 2018 running macOS Monterey 12. 5. At first, this command won’t return any data. Once the command is executed, a folder named firmware must 1 Create a package. Jan 14, 2024 · 今回は、Autowareの構造を大雑把に確認したあと、経路のtopicを調査しました。その出力を活かして次に活かすためには、自作nodeを作成しないといけません。 次回は、自作パッケージの作成&Autoware Microへ導入をしていきたいと思います。 参考文献. Nov 25, 2018 · Create a topic and publish to it at the same time. Jan 17, 2020 · topic list -t 명령어를 실행했을 때 세미나 자료는 5개의 결과가 보인다. 0, y: 0. Start a talker executable in one terminal. Sep 17, 2022 · Hi The Construct Team, I am currently learning ROS2 Basics with Python. What I have tried so far: Printed out values in odom callback function - THEY WORK FINE ! Tried ros2 topic echo /odom - THIS ALSO WORKS FINE ! Tried changing QoS reliability from BEST_EFFORT to RELIABLE and back to BEST_EFFORT The tutorial above showed a way to create a new node to subscribe to a topic, by simply using the command ros2 topic echo /<TOPIC NAME>. This is also the case if the first time I try the command: ros2 Cyclonedds: Can see topic when using ros2 topic list, but only can echo some of the topics over the wireless network. I can provide the launch file if necessary. So far so good, but now when I try to ros2 topic echo /cloud on PC=B I get nothing. Modified 2 years, 7 months ago. can not display the msg data. 다음 명령어와 같이 turtle1/cmd_vel 을 지정하게 되면 해당 토픽의 값을 확인 할 수 있다. y: 0. msg import Pose. String(data='Hello World!') Jan 27, 2022 · Hi, I am working on the ROS2 in 5 days (Python) course Unit 3 about Topics and I have issues with the following command: ros2 topic echo /cmd_vel The terminal then outputs the following: Traceback (most recent call l&hellip; Mar 22, 2022 · In my understanding the msgs are arriving, as shown by ros2 topic echo /cloud on PC=A and I can see them on PC=B shown by ros2 topic list. May 25, 2022 · However, the depthai repo has several launch files and rviz files compared to the oak-d lite repo. 6 ros2 interface show. 6 ros2 interface show 3. We can check all the options of ros2 topic echo with the command below. And terminal C, publish an Gazebo message: ign topic -t /chatter -m ignition. Open a new terminal reset the state of nmt. frame_id: map. and then run on the REMOTE PC (desktop): ros2 topic list. JointState datatype to the topic /joint_state -- I think this is working, you can confirm this with a continuous publisher and subscriber in 2 separate terminals. e. You switched accounts on another tab or window. Hello ROS2 developers! In this post, we’ll see how to work (or play) with ROS2 topics from the command line. The next few lines show you some command to have exemplary usage of the ros2_control integration: After the test is started check /dynamic_joint_states to show internal data from CAN nodes in ros2_control system. I only see it after setting the ROS_DOMAIN_ID=1 to make sure no prior topic with that name is available. The main entry point for the tools is the command ros2, which itself has various sub-commands for introspecting and working with nodes, topics, services, and more. Should be used for continuous data streams (sensor data, robot state, …). Mar 22, 2022 · Now when I ros2 topic echo /cloud on PC=A I receive the msgs as normal. The robot state publisher works ok since I can see the output from it and it runs ok. Please visit robotics. 0, z: 1. void ImageGrabber::SyncWithImu() {. esteve pushed a commit to esteve/ros2cli that referenced this issue on Dec 16, 2022. Examples of sub-commands that are available include: action: Introspect/interact with ROS actions. import { useROS } from 'react-ros'. Open a new terminal and echo data from the topic /node_1_controller/rpdo. Ask Question Asked 2 years, 7 months ago. In case network topology matters, here is a diagram of the setup: The robot is at 192. Here is the Function where that happened. Both images are run with --net host --privileged. 4 ros2 topic echo 3. add a comment. Mar 21, 2022 · I am seeing map_server is publishing only once on topic /map even and this is published when I launch the node. Viewed 41 times 0 $\begingroup$ Hello everyone, Does anyone Add option to ros2 topic echo to report lost messages. 下一步. Those are just topics carrying Image message type like below: stamp: 2 Choose a topic. l inear x, y, z 과 angular x, y, z 값을 보여 주고 있다. You signed in with another tab or window. For more context: on AWS EC2 instance, installed Isaac Sim and ROS2 Foxy and Moveit2 Foxy. on Jul 8 Steps to reproduce issue. The ros2 topic echo is the main tool that we can use to inspect topic activity. robot_state_listener_callback, 10) The warning outputs (Debug Counter before / after) are only executed once per second. REM make sure the daemon uses connext. This site will remain online in read-only mode during the transition and into the foreseeable future. Inside the file, paste: C:\dev\ros2_humble\local_setup. launch. 0 ? 6 days ago · ros2 topic echo /chatter std_msgs/msg/String. Robot state publisher. Monitor topic statistics and check performance (rostopic hz and rostopic bw) Use rostopic hz to compute the publishing rate (or frequency) of a given topic. Install the pre-requisites. That’s because it’s waiting for /teleop_turtle to publish something. node. 7 ros2 topic pub 3. Are for continuous data flow. You can go further into the field by putting periods after each subsection, so. However, when I run my node before running ros2 topic echo /foo std_msgs/String , nothing shows up. Run ros2 --help to see all available commands. The topic /turtle1/pose Nov 27, 2023 · How can I confirm the IMU and ROS2 node are working correctly, and the orientation output is configured correctly. rostopic is a command-line tool for interacting with ROS topics. The publisher decides when data is sent. Sep 12, 2021 · Since this is the ping_pong example, ros2 should be able to echo the /ping topic while the connection is open: ros2 topic echo /microROS/ping. The state of each node seems to be the same, BUT it seems there are old messages "floating around" in the topic. 그러나 나는 2개밖에 보이지 않는다. and use ros2 topic echo /msg to listen for incoming topic. It did not show any of the topics. This created a new node, /_ros2cli_25438, which I assume is the command line, subscribing to the topic /barbarians, which is being published to by the existing node /_ros2cli_publisher_std_msgs_String. wait_for_message(topic_name, SystemState, timeout=5) but the timeout was reached, and I couldn't read a message from the topic! The topic is publishing messages, and I was able to check them from the Mar 12, 2024 · Here is a demo I just ran: Step 1, Run mpa-to-ros2 on the Voxl2. 토픽 내용 확인 (ros2 topic echo) 동작 중인 토픽의 메시지 내용을 실시간으로 표시한다. I put "subscribe" in quotes as in reality, it will still subscribe to the topic (so not to a field), but it will only print the value of the field, instead of the entire message. 8}}" --once is an optional argument meaning “publish one message then exit”. header: stamp: sec: 1701139672. wait_for_message(topic_name, SystemState, timeout=5) but the timeout was reached, and I couldn't read a message from the topic! The topic is publishing messages, and I was able to check Oct 21, 2020 · You can use the --field flag of the ros2 topic echo command. Topics are a vital element of the ROS graph that act as a bus for nodes to exchange messages. Battery Level Node – Conditional Publisher in ROS2. Expected result or behaviour: Increasing counter is shown in cmd line. Now we’ll create and publish to a new topic, /barbarians: run the command below. Dec 2, 2019 · So far I can echo any topics on machine 1 itself (to make sure there are contents in the topics. rostopic echo topicname returns the messages being sent from the ROS master about a specific topic, topicname. inside Docker). $ rosrun rqt_plot rqt_plot. I'm running into an odd problem. 7 ros2 topic pub. 3 ros2 topic list 3. in a new terminal. Topic statistics. So why does the 'ros2 topic echo' command not work? Jul 2, 2022 · A temporary fix can be found by providing a default argument to the _subscriber_callback method below on line 288 within ros2topic/verb/echo. 0 more_interfaces mkdir more_interfaces/msg. stackexchange. Yes, you can access the ROS topic data in your Python code. bag: Record/play a rosbag. ここでは，classを用いて作成している．これを通して，pythonのclassについての理解も深まった．ソース I'm not sure why you're doing anything with ROS1, just source your dashing workspace and use it that way. robot_state_subscriber = self. In this console, source your built message package first. Service types are defined similarly to topic types, except service types have two parts: one message for the request and another for the response. Support QoS Depth and History via ros2 topic pub/echo. To find out the type of a service, use the command: ros2 service type <service_name>. Publishing arrays unsuccessful. mux is a ROS2 node that subscribes to a set of incoming topics and republishes incoming data from one of them to another topic, i. I get a correct result, showing the available topics that are being published. 2. Jun 10, 2020 · ros2 launch turtlebot3_bringup robot. Support container in frontend ( ros2#235) …. TLDR: The terminal shows me the data coming from topic /imu but rqt doesn't, and it's impossible to create subscribers to this topic. Return to the terminal where turtle_teleop_key is running and use the arrows to move the turtle around. Services are offered to switch among input topics, and to add and delete input topics. Oct 13, 2016 · 0. var listener = null; function EchoTopic() {. Feb 21, 2022 · ここでは，topicを使うプログラムの作成について学んでいくために，前回触れたturtlesimのカメを円を描くような軌跡で動くようなプログラムを作成する．. Funny enough ros2 topic info /cloud works fine and tells me that the publisher and subscriber count at 1 and 2 respectively. EXE-1] Parsing robot urdf xml string. destroy_node() The existing system has topics cmd_vel,light_sensors and a service motor_power. Nov 25, 2018 · 25/11/2018. If NodeStrategy node with daemon running, it will call __getattr__ via any methods to check if it can be managed by daemon. Opened up Isaac Sim - MoveIt Tutorials, hit play, Opened up a terminal, sourced ros2 setup. We can visualize depth using the rqt_image_view method again: ros2 run rqt_image_view rqt_image_view /depth. Here you can find many articles articles among which you will find information describing the principle of operation of Husarnet and many examples of using Husarnet in many applications (e. 5 ros2 bag play. When I ros2 topic list on PC=B I see the cloud topic. Let’s take a look at turtlesim’s /clear service. If you mouse over the recently created Jun 1, 2020 · If I type this in before the node has been started, and then start the node, the message does appear. Jan 28, 2023 · ros2 daemon process consumes much CPU resource more than 75% when ros2 topic echo is being issued. In a ROS2-sourced terminal, type in the command rviz2 to open RViz. Oct 31, 2018 · Run cmd: ros2 topic echo /topic_name display the msg data. 20220909. Many to many connection. 4 ros2 bag info. com to ask a new question. will display Messages published to /topic_name. will list the current topics and $ rostopic echo /topic_name. ) I can see all the topics on machine 2, but I can only echo some topics on machine 2. そんな現象にちょっと前から遭遇していた。. from geometry_msgs. lgsvl may not be needed to reproduce the behavior. Please refer to ROS 2 resources (tutorials etc) on how to do that. i have tried all four RMW with the same results. nanosec: 166159626. 1, and my laptop is 192. Only for PowerShell users, create a folder in ‘My Documents’ called ‘WindowsPowerShell’. 왜 그럴까? 그러나 topic echo /turtle1/pose는 키보드를 입력할 때마다 값이 잘 변경된다. bash, and entered ros2 topic list. 6. The topic /turtle1/cmd_vel is used to instruct the turtle to move. Watch the terminal where your echo is running at the same time, and you’ll see position data being published for every movement you make: 这里的不同之处在于移除了 --once 选项，并增加了 --rate 1 选项，这告诉 ros2 topic pub 以1赫兹的稳定流发布命令。 [待校准@8856] 您可以刷新rqt_graph以查看graphi调用y时发生了什么。您将看到 ros 2 topic pub Enter ros2 topic echo /ar_pose_marker. When I run ros2 topic echo /foo std_msgs/String first, then run my node, I see message test published on topic /foo as expected. system_info = rospy. I am running ROS2 Galactic, over Ubuntu 20. stamp: sec: 1647904550. 0. I see /imu topics: $ ros2 topic echo --once --flow-style /imu. publishing #1: std_msgs. 52b5a70. ネットで調べるとファイヤーウォール等の通信制限や、環境変数ROS_MASTER、ROS_IPの設定ミスというケースでも発生する Nov 19, 2022 · I just solved this “topic list works, topic echo does not” for my Ubuntu 20. Checking topic contents with ros2 topic echo. msg files are in the src/your_package/msg directory. I just want access to the topics over ros via my laptop, shouldn't be so complicated. Nov 7, 2022 · It does work with ROS1 though. Data might be published and subscribed at any time independent of any senders/receivers. I am using ros2 foxy and Gazebo 11, and trying to set up a simulation environment using the Go ahead and try it live below on your robot! Here is a simple echo example that prints out messages on a specific topic to the console: // EchoTopic. ros2将复杂系统划分成许多模块化节点．话题是ros网络中一个至关重要的元素，扮演着节点间信息交互班车角色． rostopic listでトピック一覧表示はできる、なのにrostopic echoでトピック内容は表示できない。. In your workspace src directory, create a package more_interfaces and make a directory within it for msg files: ros2 pkg create --build-type ament_cmake --license Apache-2. Apr 20, 2002 · the following commands also cause segfault. spin(node) except KeyboardInterrupt: pass. def _subscriber_callback(self, msg, info='Default'): submsg = msg. But how to set ASYNCHRONOUS_PUBLISH_MODE in ROS2. Let’s run the publishing node only once. This is very useful for tinkering with ROS2 topics as wells as writing and debugging mission-critical ROS2 programs. Install the main repos and build the code. However, when I run this command a second time, it only shows the default topics: /parameter_events. echo from the same machine works. At startup, the first input topic on the command line is Sep 3, 2020 · Hi everyone, I have been looking for a solution since days now, going through every topics possible here I think. PowerShell_profile. It accumulates the data passed on any number of topics and saves it in a database. On terminal D, start an Igntion listener: ign topic -e -t /chatter Nov 23, 2016 · Not sure about the approach the wiki describes, but at least in a Bash shell, the following works for me: $ rostopic pub /send_BTSVR std_msgs/String "data: '\ first line second line third line '" Oct 9, 2022 · No milestone. To see all available sub-commands run: ros2 --help. Callbacks receive data once it is available. ros2 topic hz /rslidar_points. listMethods API to XMLRPC server. Aug 7, 2021 · Step 3. 2 participants. That's the cycle of the robot_state_msg. However, this command results in: WARNING: topic [/microROS/ping] does not appear to be published yet. If you're trying to publish a ROS1 topic to ROS2, that's not going to work, nor is it going to work to try to publish a ROS1 compiled message from ROS2, you need to compile the messages in ROS2 to create the IDL files for DDS. Now let's try the other way around, ROS 2 -> Gazebo. The problem is that there is a riddle (no values published) in the pose topic. Step 3, confirm that the ros2 topics actually exist on the Voxl2 and that the mpa-to-ros2 node did not fail. org is deprecated as of August the 11th, 2023. ros2 topic echo /asdfg) Comment by Ranjit Kathiriya on 2021-09-23: Jul 10, 2023 · You posted a screen where you ran ros2 topic echo command. ros2 topic list – Prints information about active topics. May 8, 2020 · ros2 topic echo /str1. Reload to refresh your session. To be more specific, I can't echo any image/camera topics that is sending from machine 1. AIチャレンジ May 24, 2019 · # Shell 3 $ ros2 run ros1_bridge dynamic_bridge --bridge-all-topics # Shell 1 $ rostopic list /joint_command /rosout /rosout_agg $ rostopic echo /joint_command position: 0. Dec 2, 2021 · Hi, I want to read a message from a topic once, thus I tried to use like this: topic_name = "/yumi/rws/system_states". ros. Read Introspection with command line tools for more information and an example. x. Background ros2 bag is a command line tool for recording data published on topics in your system. providing the type on the echo never actually prints our any messages. Observed result or behaviour: ros2 topic echo not working, no output just seems to be blocked. New in ROS indigo I am not sure what do you mean with all the steps I have followed. jacobperron removed the in review label on May 15, 2019. ps1. field: try: 2 Choose a topic. This is mentioned on wiki/rostopic - echo: echo <topic-name/field> Display specific fields in a message. Echo this topic in a separate terminal and then use the teleop node to move the turtle to observe how velocity commands are given to it. ros2 topic echo/hz causes segment fault. ros2 topic list. Here is an example: ros2 topic echo /imu_test --field linear_acceleration. g. May 14, 2019 · jacobperron added a commit that referenced this issue on May 15, 2019. Have a look at the Python sample, which uses a timer to do some work. msg. No branches or pull requests. if self. Usage. Sep 30, 2022 · I am using the command: ros2 topic pub --once /topic geometry_msgs/msg/Pose "{position:{1,1,1},orientation Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 131. py. set RMW_IMPLEMENTATION= rmw_connext_cpp. 0-1jammy. In Terminal 1: root@759719bcb5a5:/# ros2 topic pub /barbarians std_msgs/String "data: Hello World!" publisher: beginning loop. More about Husarnet VPN Husarnet is open source and free to use up to 5 devices. Here we'll use rqt_plot to plot the data being published on the /turtle1/pose topic. the topic shows up on the ros2 topic list on both machines. 57594316322 Additionally, if the bridge is killed and restarted without --bridge-all-topics , the it can still be echoed in ROS 1, which is correct behavior, but this could Mar 17, 2022 · 2. 背景. . You can leave the rosject public. 总结 5. ros2 daemon stop. In a new terminal, enter the command: Mar 22, 2024 · $\begingroup$ It could be due to a couple of reasons. The terminal will show the fields for each message as they come in, separated by a --- line. z: 0. ros2 topic hz /tf_static. ros2 daemon start. You signed out in another tab or window. I'm using ROS2 Galactic inside of docker images, one of which is running on my laptop, and another running on a Husky robot. Dec 3, 2021 · Once inside, let’s create My Rosjects and then, Create a new rosject: My Rosjects. 3 ros2 bag record. Take the following example: #!/usr/bin/env python. x: 0. /rosout. Background ROS 2 breaks complex systems down into many modular nodes. I am sure that the robot_description topic is published with the QoS durability option set to transient_local. Let’s go, shall we? Getting Ready for the Action. The root cause is that ros2 topic echo keeps calling system. Dec 11, 2023 · self. Then im calling the ORB_SLAM3 method and able to publish the pose which is /orb_pose topic. Summary. 9 Clean up. Hi, I want to read a message from a topic once, thus I tried to use wait_for_message() like this: topic_name = "/yumi/rws/system_states". 2 Choose a topic. StringMsg -p 'data:"Hello"' At this point, you should see the ROS 2 listener echoing the message. 168. import React, { useState, useEffect } from 'react'. While, I wanna call service motor_power to turn on/off the motor Once you have a ROS 2 installation in the computer, follow these steps to install the micro-ROS build system: user@user:~$ ros2 topic echo /microROS/ping stamp Aug 18, 2023 · I subscribe to twp topics , namely camera-image which is /camera/image and imu which is /drone/imu. import numpy as np. , it's a multiplexer that switches an output among 1 of N inputs. Step 2, do ros2 topic list on my machine and see nothing. Echo the topic in another terminal. And the echo on the topic looks something like this. ros2 topic echo /imu_test --field linear_acceleration. 4 ros2 topic echo. The output is quite long so it’s not replicated here. ros2 topic echo -h. Could not determine the type for the passed topic. ros2 topic hz /tf. If I create my own node that subscribes to the intrabay_door_state topic with a transient_local QoS, then this node can retrieve the door state even if it starts after the publishing node. 0, z: 0. [robot_state_publisher. Next steps. Development. But the message that is published, is sent twice. I am currently on the Topics Quiz and stuck there unable to get any message from /odom topic. Mar 19, 2020 · Attention: Answers. This step creates firmware workspace that targets all the required code and tools. It’s important to note that this argument needs to be input in YAML syntax. create_subscription(. Sep 21, 2022 · $ ros2 topic echo --once /test2 data: true --- Package version: $ apt show ros-humble-rqt-publisher Package: ros-humble-rqt-publisher Version: 1. 1. which will give the output. Jul 8, 2020 · A better approach in ROS 2 is to create two timers, one for each publisher, and then call spin() and let the executor handle scheduling the timers so that your publish() calls get made at the right times. csv とかしたらいいんだけど，実験時間分待たなきゃいけないのでやだ． 2022/04/22 rosbagsを発見. Fix special case 2. Create a new rosject. ros2 run demo_nodes_cpp talker. ok, so there are 2 problems Publishing a sensor_msgs. Thus you’ll have 4 publishers on this topic, and your subscriber can receive all the data and make the computation. 0}, angular: {x: 0. Conditions where it occurred / Performed steps: RMW_IMPLEMENTATION=rmw_iceoryx_cpp ros2 topic echo /chatter does not print any output when running the talker/listener demo. ros2 topic pub /asdfg nav_msgs/msg/Path) and on the other machine I use ros2 topic echo /topicXYZ (e. In a new terminal, enter ros2 run rqt_plot rqt_plot. Alternatively: rostopic echo can "subscribe" to individual fields. It may look like the messages are static, but they are actually just continually publishing the same values. 116. support ros2topic echo once option. My qos should allow only the Jul 12, 2022 · Once you have several nodes running, use ros2 topic to fetch information for any published topic. 5 ros2 topic info. const { createListener, topics } = useROS(); Apr 15, 2024 · Use ros2 topic echo /<topic> to see the raw information that is being passed along. ros2 topic type /your_topic – Returns the message type for a topic. import rospy. Run ros2 <command> <verb> --help for even more usage information on a specific command's verbs. I created a node that it will take the msg from light_sensors, then publish msg into cmd_vel. In the new window that should pop up, a text box in the upper left corner gives you the ability to add any topic to the plot. field is not None: for field in self. Press Ctrl+C to exit. [ros2topic] Handle multiple namespace parts in message type ( #237) …. pi@pi-desktop:~/ros2_ws2$ ros2 topic echo /statistics Unable to convert call argument to Python object (compile in debug mode for details) ubuntu 22. 04 LTS Desktop as a virtual machine in VMware Fusion 12. Creating a new firmware workspace for ESP32. Run ros2 <command> --help for more information on individual command usage. 0 ---. from pycrazyswarm import *. We will check the images published this time in RViz2. 8 ros2 topic hz. ros2 multicast receive / send functions as expected. Nov 17, 2022 · On the Create3 / TurtleBot4 robots which run ROS2 Galactic, I can access the battery info with: ros2 topic echo /battery_state but in Galactic there is no “–once” option so the CLI command continues until control-c signaled, preventing simply adding the topic echo to my status script (which I can do in ROS2 Humble). 3 ros2 topic list. For example: $ rostopic list. Jan 19, 2020 · node = SubscriberClientAsync() try: rclpy. I publish a topic with ros2 topic pub /topicXYZ msg_type (e. Thought this was an EC2 instance problem, tested this on my To undo this, locate your system’s shell startup script and remove the appended source command. rosbags を使えばOK． ros2のシステムが入っていなくても使える． 以下は旧情報． 暫定解 Topics. Here are the steps I followed for ROS2 Foxy, these may be different for you based on your ROS distro and your environment so you may have to tweak the steps. ros2 topic echo /your_topic – Displays messages published to a given topic. ps1’. Actual behavior. Input the full command like so: ros2 topic pub --once /turtle1/cmd_vel geometry_msgs/msg/Twist "{linear: {x: 2. 04 aarch64 on raspberrypy 4B 8Go ROS2 humble Building from source. You can open multiple terminal windows/tabs and use rostopic echo in each one, or you spawn multiple copies of rostopic, all echoing to the console. 0. nanosec: 512909420. Feb 14, 2022 · ros2 bag play ** で再生しながら ros2 topic echo --csv /YOUR_TOPIC > MY_CSV. The topic /turtle1/color_sensor tells you the RGB values of the color of the trail left behind when the turtle moves. fy pm cg yn tu us vg gc ph rh