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2020-02-13 13:16:44 -0600 commented answer How to run more than two UST-10LX or UST-20LX in ROS using urg node?

That's why we have different namespace arguments. It will publish topics as lidar1/scan and lidar2/scan.

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2016-04-27 09:27:03 -0600 asked a question What does the point data in topic velodyne_points represents and how can we use this data in custom program for getting depth of objects?

I am working with VLP_16 and want to use it in my custom program. I want to know what does velodyne_points publishes and how can i use it my program for depth estimation?

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2015-02-21 09:25:27 -0600 answered a question How to run more than two UST-10LX or UST-20LX in ROS using urg node?

You will have to change the IP settings of one of your UST. After that use a router to connect Lidars with your PC. Then change IPV4 settings to manual and IP address to 192.168.0.100 (as told by hokuyo). After all this you will be able to run both the lidars individually using the command rosrun urg_node urg_node _ip_address:="192.168.0.10" for the lidar with default settings and _ip_address:="192.168.0.x" for new settings.

For launching both these together you can make a launch file. You can use:

<launch>
  <node ns="lidar1" pkg="urg_node" type="urg_node" name="lidar1" >
    <param name="ip_address" value="192.168.0.10"/>
  </node>
  <node ns="lidar2" pkg="urg_node" type="urg_node" name="lidar2" >
    <param name="ip_address" value="192.168.0.12"/>
  </node>
</launch>

It will work for sure. Cheers!