Ros2 in 5 days python rosject, no laser topic

[BenevolentCyborg]

Part 1 tells me to I have to subscribe to the laser topic, but there is no topic named laser or any related to lasers. The only topics are /parameter_events and /rosout.

[marco.nc.arruda]

Hello @BenevolentCyborg ,

If you don’t see the topics, it’s very likely something went wrong on the simulation starting.
If this happen, the best way to proceed is to use the “restart” button over the simulation window. It will relaunch the robot program

Is it still happening to you?
Please, let us know

Regards

[BenevolentCyborg]

It is still happening. When start the ros1_bridge, a bunch of services are created, but only one topic, /rosout

[roalgoal]

Hi, are you trying to run the bridge with the simulation? Can you see the robot in gazebo? Is this with the real robot? I will take a look in the rosject

[bd16]

I have the exact same issue, is there a solution?

[bayodesegun]

The topics are shown on demand, by default. Please have a look at this answer here:

Cannot find topic /scan using ros2 topic list

Hello @bd16 , Don’t worry about the gazebo errors/warning, they are expected and don’t affect the simulation. As for the bridge comments, that’s the expected behavior. The topic won’t be shown in ROS2 until a specific connection is made to the topic (ie., you create a ROS2 Subscriber that subscribes to the ROS1 topic). This is done for optimizing resources. If you want to see all the topics always, you need to run the bridge like this: ros2 run ros1_bridge dynamic_bridge --bridge-all-topics H…