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2017-02-10 03:03:38 -0500 | commented answer | How can I use two velodyne(VLP16) together at the same time? Thank you for your kind answers. As I follow your directions, the sensors work independently! Setting the UDP port numbers was the critical point. I didn't try applying the coordinate problem. But I think I can proceed well. Thank you again! |
2017-02-10 03:02:53 -0500 | answered a question | How can I use two velodyne(VLP16) together at the same time? Thank you for your kind answers. As I follow your directions, the sensors work independently! Setting the UDP port numbers was the critical point. I didn't try applying the coordinate problem. But I think I can proceed well. Thank you again! |
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2016-08-29 02:31:57 -0500 | commented answer | How can I use two velodyne(VLP16) together at the same time? [ https://github.com/JohnJungHwanYoo/Mu... ] As I told you before,only a few sources in nodelet_manager.launch and VLP16_points.launch are changed.In my github,VLP16_points.launch is the original launch file,my modified launch file is VLP16_points2.launch |
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2016-08-26 00:42:19 -0500 | asked a question | How can I use two velodyne(VLP16) together at the same time? Hello, I have a question about operating two velodyne laser sensors (VLP 16). I’m a ROS and Ubuntu beginner. So, even if my question is inexperienced, please understand me and answer as in detail as possible. Thank you in advance. I use Ubuntu 14.04 and ROS indigo. I’m trying to operate two velodyne laser sensors – VLP 16 simultaneously in one laptop. I designate IP of each sensors as 192.168.1.201 and 192.168.1.202. I fixed my laptop Ethernet IP as 192.168.1.77 to coincide bandwidth(?); I mean the third number of IP address like 192.168.”1”.77. I made two sensors connect to my laptop using hub. I use Velodyne package and modified “VLP16_points.launch” in velodyne_pointcloud folder and “nodelet manager.launch” in velodyne_drvier folder to operate at the same time. In nodelet_manager.launch of velodyne_driver folder, I attached In VLP16_points.launch of velodyne_pointcloud folder, I made the source code as two group and tried to operate independently. First group is defined I ran VLP16_points.launch and rviz , and topic of Pointcloud2 in rviz was presented /ns1/velodyne_points, /ns2/velodyne_points. As I pick the topic: /ns1/velodyne_points, pointcloud of two VLP16s appear simultaneously with regardless of IP address. I tried changing sensors’ IP and “device_ip” of VLP16_points.launch and nodelet_manager.launch. But regardeless of these change, pointcloud in rviz was appeared at the same time in topic /ns1/velodyne_points which is the topic of first group in VLP16_points.launch. When I pick the topic as /ns2/velodyne_points, no pointcloud appears. The terminal presents “bind: Address already in use” The Notice was not showed when I run only one VLP16. I hope to use the pointcloud independently to apply tf to sensors independently. There were also other attempts in similar ways like operating two same launches which has “different device_ip”. But it also shows same result. Thank you for reading this long question. Have a nice day. |