[ROS in 5 mins] 015 - How to use remap in launch files

Hello ROS Developers!

In today's video we are going to see how to use remap in a launch file.

For that we are going to use Robot Ignite Academy, which is available at http://www.theconstructsim.com/construct-learn-develop-robots-using-ros/robotigniteacademy_learnros/

But before we start, if you are new to ROS and want to Learn ROS Fast, I recommend you to take any of the following courses on Robot Ignite Academy:

ROS Basics In 5 Days (Python) - http://www.theconstructsim.com/construct-learn-develop-robots-using-ros/robotigniteacademy_learnros/ros-courses-library/ros-basics-in-5-days/
ROS Basics In 5 Days (C++) - http://www.theconstructsim.com/construct-learn-develop-robots-using-ros/robotigniteacademy_learnros/ros-courses-library/ros-courses-ros-basics-in-5-days-c/

By following the video you will see that to create a package, we have used the following command:

catkin_create_pkg tutorial rospy

Then we have created a file called publisher.py and we have given execute permission with:

chmod +x publisher.py

The code of publisher.py is the following:

#! /usr/bin/env python

import rospy
from std_msgs.msg import String

pub = rospy.Publisher('topic_name', String, queue_size=10)
rospy.init_node('node_name')

r = rospy.Rate(10) # 10hz
while not rospy.is_shutdown():
pub.publish("hello world")
r.sleep()

After that we have created a file remap_demo.launch and launched it with:

roslaunch tutorial remap_demo.launch

For explanation about the codes shown here, please watch the video.

Whether you like the video or not, please leave a comment on the comments section below, so we can interact and learn from each other.