G-mapping-Readme

Introduction

G-mapping is a ROS-compatible mapping tool designed for robotic applications. The following steps outline the setup process for utilizing G-mapping with an RPLidar sensor.

Prerequisites

Before starting, ensure you have the necessary permissions for the RPLidar sensor's port. Run the following command to grant permission:

bash

sudo chmod 666 /dev/ttyUSB0

Replace /dev/ttyUSB0 with the correct port based on your system.

Launching RPLidar

Navigate to your ROS workspace directory. In the provided example:

bash

cd ~/richard/src/rplidar_ros/launch/

Launch the RPLidar node using the appropriate launch file. In this case, we use rplidar.launch:

bash

roslaunch rplidar.launch

Ensure the RPLidar initializes successfully and note the assigned serial port.

Initializing fake odom

Run the fake_odom_pub.py script to publish the fake odometry node from lidar: <--only use when your using lidar as for odometry data-->

bash

rosrun fake_odom_pub.py

To provide a static transform using the rosrun tf command:

bash

rosrun tf static_transform_publisher 0 0 0 0 0 0 odom base_link 80

Launching G-mapping

Open a new terminal and navigate to the ROS workspace directory:

bash

cd ~/richard/src/G_MAPPING

Finally, launch G-mapping using the appropriate launch file, for instance:

bash

roslaunch gmapping_map.launch

Launching Map Saver

To save the map run the following command:

bash

rosrun map_server map_saver -f map

Ensure the sequence is followed meticulously for accurate mapping results. Refer to the ROS documentation or community forums for troubleshooting or additional information.

Additional Notes

Make sure to replace /dev/ttyUSB0 with the correct port assigned to your RPLidar. Adjust file paths based on your ROS workspace structure. Consult RPLidar and G-mapping documentation for further customization and troubleshooting.