Questions tagged with Robotics

I'm doing the Hello World tutorial in RoboMaker and I want to visualize my simulation application in Gazebo, and after having runned both the robot application and the simulation application I have typed the following commands: > $ export DISPLAY=:0 > $ xhost + > $ docker container ls > $ docker exec -it elegant_ardinghelli bash > $ rosrun gazebo_ros gzclient where "elegant_ardinghelli" is the container name that contains the docker image of the simulation application, but when I run the last command the following error pops up: "bash: rosrun: command not found". Do you know what could be the source of the error?

I'm following the Hello World tutorial in the RoboMaker developer guide and I have runned the robot application with the following command: > $ docker run -it -v /tmp/.X11-unix/:/tmp/.X11-unix/ \-u robomaker -e ROBOMAKER_GAZEBO_MASTER_URI=http://localhost:5555 \-e ROBOMAKER_ROS_MASTER_URI=http://localhost:11311 \robomaker-helloworld-robot-app:latest roslaunch hello_world_robot rotate.launch ad the simulation application in this way: >$ export DISPLAY=:0 >$ docker run -it -e DISPLAY -v /tmp/.X11-unix/:/tmp/.X11-unix/ \-u robomaker -e ROBOMAKER_GAZEBO_MASTER_URI=http://localhost:5555 \-e ROBOMAKER_ROS_MASTER_URI=http://localhost:11311 \robomaker-helloworld-sim-app:latest roslaunch hello_world_simulation empty_world.launch gui:=true I get now the following errors > [[Err]] [ [ModelDatabase.cc:235]] No <database> tag in the model database database.config found here[[http://gazebosim.org/models/]] > [[Err]] [[ModelDatabase.cc:294]] Unable to download model manifests >[[Err]] [[REST.cc:205]] Error in REST request and the Turtlebot inside Gazebo stands still instead rotating around the z axis as the code of the helloworld tutorial says. Do you know what are the causes of these errors?

I'm following the helloworld tutorial for RoboMaker, and when I have to launch the simulation application with the following command: >docker run -it -v /tmp/.X11-unix/:/tmp/.X11-unix/ \-u robomaker -e ROBOMAKER_GAZEBO_MASTER_URI=http://localhost:5555 \-e ROBOMAKER_ROS_MASTER_URI=http://localhost:11311 \robomaker-helloworld-sim-app:latest roslaunch hello_world_simulation empty_world.launch it runs the application but it does not open Gazebo in the virtual desktop to visualize the robot. How do I have to change this command?

I'm following [this](https://aws.amazon.com/blogs/robotics/deploy-robotic-applications-using-aws-robomaker/) tutorial for deploying robot applications on real robots using aws robomaker. My question is, will the source code be available on the deployed robot? if yes, how should I deploy my code so the user don't have access to the source code?