1.How to connect 2 machines in the ROS system:
change files: /etc/hosts
add the IP address and hostname of another system anywher, like :"209.2.234.161 raspberrypi"
change files: ~/.bashrc
add "export ROS_HOSTNAME=ubuntu
export ROS_MASTER_URI=http://209.2.234.161:11311 " in the end of this file
(where the ros_hostname correspond to the computer itself but master_uri correspond to the
only IP address,ie http://209.2.234.161 is the address of raspberry pi,I want to use raspy
as the master pc, so both raspy and another pc has to write:
export ROS_MASTER_URI=http://209.2.234.161:11311 ,11311 is a must.
2.Data files contains the python files describing how to change 2D point cloud into x y z axis