Nav2 Mapping with SLAM Toolbox | ROS2 Developers Open Class

[@Sowbhagya-ow3is]

Sir I have a problem in web shell it showing that in lunch file we don't found any documents

[@MemoxCid]

Hello I want to buy yours courses because I have a lot of problem with Ros2Control and Nav2

[@marcomollo1603]

How do you use the localization mode

[@usimian]

I saw this video and because it uses slam_toolbox, I signed up for the courses. Unfortunately, I can't find this course at The Construct. I want to use slam toolbox. Can you help?

[@RickTellezL]

Sorry Marc, we do not have slam_toolbox covered on the courses yet. That is work in progress but do not expect to have it before October. If you got confused by our video, you can request a refund and you will be refunded

[@usimian]

@@RickTellezL I appreciate that. I'll work with the current courses for now. Learning is learning.

[@Patel-nj2nj]

sir, i need help . i have created simple 4 wheel robot include imu , odom , differential drive, ultrasonic sensor in gazebo but i don't know how i can start after this i want to make a map of unknown world and learn navigation

[@davisoguns3510]

install gazebo plugins on the frames of your robot for example if its a urdf model , inlcude gazebo plugin which always come along with topics in which you can tweak , for example a gazebo plugin for a LIDAR sensor can be added to the frame of your robot .So basically when all these is done and you can see the topic being publish to the shell you can strart tweaking the mapping stack according to the name of the topic of your robot . for example you need a LIDAR for perception and mapping the environment the topic in which the lidar publish in gazebo which can be '/scan' topic will be included in the mapping stack parameter /edited .

[@davisoguns3510]

for object avoidance you can write subscribing Node be it .py or .cpp to the topic which is '/scan' to perform some task in which when the lidar senses an object at certain distance or range the robot wheels acts since you are publishing to command velocity topic . lidar sensor publishes a scan topis you write a node that subscribes to it , while you publishes certain velocity to the wheel of the robot either when the robot senses an object it stops , move backward ,foward or turn at angular velocity of -z 0r +z

[@davisoguns3510]

if you have installed imu plugin you can fuse it with odom for great and perfect localization using the EKF node as well .

[@YJRQZ777]

good ,thank

[@Patel-nj2nj]

why nobody is replying

[@Patel-nj2nj]

please reply fast