Hands-On ROS for Robotics Programming

Laptop network configuration

For the remote computer, these are the equivalent steps:

1. Execute the following two commands in a Terminal to set the environment variables:

$ export ROS_HOSTNAME=192.168.1.54$ export ROS_MASTER_URI=http://gopigo3.local:11311

You specify its IP address as 192.168.1.54 in the first line, while in the second, we are stating that the ROS master is located in the robot, that is, gopigo3.local. This way, your system won't need to be reconfigured if the network is restarted and a different IP address is assigned to the Raspberry Pi.

2. As for the robot, add the following two lines to the .bashrc file to automate the configuration each time a new Terminal is launched:

$ echo export ROS_HOSTNAME=rosbot.local >> ~/.bashrc ...