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The parameters for the sensor_msgs/Laserscan messages must be set in the respective LiDAR driver. This is not something that can be "tuned" for the navigation, but is rather something that is inherent to the LiDAR model and its configuration.

For the Sick S300, you can e.g. use the cob_sick_s300 package (there are others, obviously), which either reads most of the data from the provided data stream or is configured internally without any parameters that can be set from the outside (i.e. ROS). This wouldn't make any sense, for most, as those two have to fit together anyways.

You can obviously check if your LiDAR configuration matches the parameters, if this is not the case, you can adjust the respective driver from source. But this is not something you do somewhere in the Nav stack...