I have an error trying to subscribe to multiple topics, between them there are two of the same type, this is the error, please what can I do ? | 1 answers | 0 votes | Asked on 2019-12-18 10:49:40 UTC

Hi, I want to use the message filter in this example , I tried to register callback from a class member function as in the following code: | 1 answers | 0 votes | Asked on 2019-12-30 01:05:06 UTC

hi, I have a troubule with this code, this run but when write in terminal rostopic hz '/PWM' say 'no new messages', and when write rostopic echo /PWM, not display anything. please what can I do ? | 0 answers | 0 votes | Asked on 2020-01-08 16:51:24 UTC

I am using in rviz2 the tool nav2 goal. But I want to cancel the robot's navigation when it is at a distance of less than 2 meters from an obstacle | 1 answers | 0 votes | Asked on 2023-05-23 20:22:41 UTC

Hello everyone, I am running multiple nodes in different executables and I would like to use MultiThreadedExecutor. However, how to know which cores are my nodes using ? | 1 answers | 0 votes | Asked on 2023-05-31 16:14:21 UTC

Hello, I want to use the Groot monitor. Is it possible to use a groot monitor with the turtlebot simulation ? | 0 answers | 1 votes | Asked on 2023-06-05 18:04:12 UTC