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2014-08-05 05:00:01 -0500 | answered a question | Warning "No map received" occurs, when trying to visualize map in rviz My gmapping.launch file that solved the problem: |
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2014-08-05 04:58:43 -0500 | commented answer | Warning "No map received" occurs, when trying to visualize map in rviz Yes, that helped a lot. Tanks. I wrote a launch file, that uses my parameters. |
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2014-07-05 08:22:26 -0500 | commented answer | Warning "No map received" occurs, when trying to visualize map in rviz when using the remapping i do not get any warnings in my terminal. When not adding it i get the warning: Failed to compute laser pose, aborting initialization ("base_link" passed to lookupTransform argument target_frame does not exist. ) |
2014-06-30 04:57:31 -0500 | asked a question | Warning "No map received" occurs, when trying to visualize map in rviz Hello, i am trying to visualize a map in rviz using slam_gmapping on my youbot. When adding the display Map to rviz and choosing map as topic the warning "No map received" occurs. I can visualize the sensor data in rviz by adding the display laser scan but it does not create a map. I searched for this error in ros answers but could not find an answer fixing my problem. The ROS_MASTER_URI is set to my youbot: ROS_MASTER_URI=http: //Jakobs-youBot:11311/ My tf tree is map -> odom -> base_footprint -> scan. My laser scan topic is scan. I am starting slam_gmapping with and do not get any output after starting it. Is this supposed to be like that? I am using a youbot with ubuntu 12.04 and ROS hydro. My the laser i am using is a hokuyo laser. I really do not have any idea what i am doing wrong. If anyone can help me, i would really appreciate it. If you need any more information, please let me know. Thanks a lot. |
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2014-06-17 10:39:29 -0500 | commented answer | /base_scan observation buffer has not been updated yes, thanks a lot |
2014-06-17 07:52:08 -0500 | answered a question | /base_scan observation buffer has not been updated My updated costmap_common_params.yaml is: I think it is running properly now. The result of rostopic info /scan is: The warning stops after receiving info: odom received |
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2014-06-13 05:55:12 -0500 | answered a question | hokuyo_node. Why does Fixed Frame [laser] does not exist? Found a solution. My wrapper publishes the transformation odom -> base_footprint of my youbot. With this tutorial http:// wiki.ros.org/navigation/Tutorials/RobotSetup/TF wrote a transformation base_footprint -> laser. So now i have the tf tree odom -> base_footprint -> laser |
2014-06-13 04:08:11 -0500 | commented question | /base_scan observation buffer has not been updated No. It still doesn't work. I changed sensor frame to laser aswell, because i need to chose laser in rviz to see laser scans but this did not solve the problem either. Thougt the issue could be with my tf tree, but it is odom -> base_footprint -> laser...this should be correct too. |
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2014-06-11 05:54:14 -0500 | commented question | /base_scan observation buffer has not been updated No, it is publishing under /scan. |
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2014-06-11 02:40:04 -0500 | commented question | /base_scan observation buffer has not been updated Sorry for answering that late. The message appears again and again. What do you mean with "the topic is properly connected?" I am using ros hydro on ubuntu 12.04 by the way. Just in case this is important. Note that i added my costmap_common_params.yaml. |
2014-05-29 22:45:06 -0500 | asked a question | /base_scan observation buffer has not been updated Hi, i am trying to get the navigation stack running. Hokuyo is the laser scanner i am using. When i am launching move_base_local.launch i receive the warning "The /base_scan observation buffer has not been updated for XX.XX seconds, and it should be updated every 0.20 seconds." My launch file is: <launch> </launch> My local_costmap_params.yaml is: My global_costmap is: My costmap_common_params.yaml is this: What am i missing or doing wrong? Cannot figure it out myself and couldn't find any proper answers online. Thanks a lot. |
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2014-05-26 04:29:48 -0500 | asked a question | hokuyo_node. Why does Fixed Frame [laser] does not exist? Hello everyone, i'm trying to get hokuyo_node running on my youbot (ros hydro, ubuntu 12.04) and i am facing a problem. I would like to chose /laser as Fixed Frame in Global Options. But it does not exist. I get the warning "Fixed Frame [laser] does not exist" in Global Status when i type it in manually. Does anyone know how to fix this problem? I'd really much appreciate any help. Be aware, the main problem i am facing is that i want to get the navigation stack running on my youbot. When starting the navigation stack i am getting two warnings and i think i can solve one of them with this. Thanks a lot. |
2014-05-20 23:50:20 -0500 | commented question | Why can't youbot_battery_monitor connect to serial port? Solved it. I changed SUBSYSTEM=="usb" to SUBSYSTEM=="tty". This fixed it. Now it is running how it is supposed to do. Tanks a lot for your help. |
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2014-05-19 23:11:51 -0500 | commented question | Why can't youbot_battery_monitor connect to serial port? Check edited question... |
2014-05-19 22:17:01 -0500 | commented question | Why can't youbot_battery_monitor connect to serial port? the lcd_display file has these permissions: lrwxrwxrwx 1 root root The udev rule does start youbot_battery_monitor.sh, which starts the exe. The process is running. But it is beeping the whole time and i think it is beeping because it doesn't get a signal because cannot connect to the serial port?? |
2014-05-19 03:45:34 -0500 | asked a question | Why can't youbot_battery_monitor connect to serial port? Hi, i am trying to get youbot_battery_monitor running on my youbot. The README (cannot post link, please check yourself on google) says i could run youbot_battery_monitor as standalone program. But when i try to run it with
it says "could not to connect to serial port: /dev/youbot/lcd_display" I wrote a udev rule 110-battery.rule:
My youbot_battery_monitor.sh looks like this:
The udev rule seems to be working. It at least generates the /dev/youbot/lcd_display file. But i am not really sure about using SUBSYSTEM=="usb"?! I don't use the youbot that long yet. I'd really much appreciate any help. Thanks a lot. Edited after ahendrix 2nd comment: I think i finally solved the problem why it cannot connect to the serial port. But it is still not running properly yet. I can execute youbot_battery_monitor.sh by typing "sudo bash youbot_battery_monitor.sh". I obviously needed the root rights i got by adding sudo. This is the output i get then:
Every time it prints [W ] and [L ] it is beeping. |