Learning Robotics using Python - Second Edition

Hello_world_publisher.py

The hello_world_publisher.py node basically publishes a greeting message called hello world to a topic called /hello_pub. The greeting message is published to the topic at a rate of 10 Hz.

Here is a diagram that shows how the interaction between the two ROS nodes works:

Communication between the publisher and subscriber node

The full code of this book is available at https://github.com/qboticslabs/learning_robotics_2nd_ed.

The step-by-step explanation of how this code works is as follows:

1. We need to import rospy if we are writing a ROS Python node. It contains Python APIs to interact with ROS topics, services, and ...