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2019-05-20 02:03:35 -0600 marked best answer How to connect VLP-16 (confused about the tutorial)

I try to connect VLP-16 to indigo in four ways, but all failed and led to the same result (no data was printed through command "rostopic echo /velodyne_points" and "rostopic echo /velodyne_packets"):

First method, refer to tutorial about VLP-16 http://wiki.ros.org/velodyne/Tutorial...

1 Access the Gnome Menu (Super key), type "Networks Connections" then run it.

2 Select the connection's name and click on "edit".

3 Choose the IPV4 Settings tab and change the “Method” field to "Manual". Set as below, according to http://answers.ros.org/question/23599... :

image description

Is the setting correct?

4 sudo ifconfig eth0 192.168.3.100

5 I don't what it means in tutorial: "Add a static route to the LIDAR's IP address. The IP address can be found on the CD case which was included with the LIDAR. sudo route add 192.168.XX.YY eth0", since I don't have a CD. What should XX and YY be? Or can I skip this step?

Second method:

1 sudo route add 192.168.1.201 eth0 (Without turning off wire and change the settings in "Network Connections")

Third method:

1 sudo ifconfig eth0 192.168.1.77 (Without turning off wire and change the settings in "Network Connections")

Fourth method: 1. sudo ifconfig eth0 192.168.1.77

  1. sudo route add 192.168.1.201 eth0

After any of the methods,

I applied:

$ roscore

change to the correct workspace

$source devel/setup.bash

$ roslaunch velodyne_pointcloud VLP16-points.launch

Then, $ rostopic echo /velodyne_points

$ rostopic echo /velodyne_packets

no data was printed from any command above

Or

rosrun rviz rviz -f velodyne

After open the interface: image description "No tf data. Actual error: Fixed frame [velodyne] doesn't exist"

So, what's wrong with the connection to VLP 16? Can you provide me with a detailed and correct way to connect VLP 16 to indigo (Don't mention the tutorial. It is based on HDL-32E)?

Thanks for you all!

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2019-04-08 01:11:56 -0600 marked best answer How to connect VLP-16 velodyne to indigo?

Under Ubuntu 14.04, indigo, My situation now is:

      sudo ifconfig eth0 192.168.1.77

(in new ternimal)

      roscore

(in new terminal)

      cd ./catkin_ws  
  source devel/setup.bash
  roslaunch velodyne_pontcloud VLP16_points.launch

in new terminal:

 rostopic echo /velodyne_points     However, there is no data printed.
 rostopic echo /velodyne_packets   It is said:"Cannot load message class for [velodyne_msgs/VelodyneScan]. Are your mess ages bulit?"

Whether I powered and connected the lidar to my computer or not, there seems to be no difference in the results above.

I think this means the velodyne lidar wasn't connected to linux OS. Is it true?

Therefore, how to connect VLP-16 velodyne to indigo? How to connect the lidar with my computer through the ethernet? I only need to power the lidar and connect the lidar to my computer by the Ethernet line, and I don't need to do anything else? For example, I need to turn off wifi or change some network settings in my linux system?

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2017-06-16 12:15:33 -0600 commented answer Is there an alternative way to connect to machines through the same ROS?

OK, thanks very much.

2017-06-16 11:59:55 -0600 commented answer Is there an alternative way to connect to machines through the same ROS?

Do you mean that generally two ros machines can be only connected through wifi?

2017-06-16 10:14:24 -0600 edited question How to use a microcomputer to read data from ethernet and send it by wifi at the same time?

How to use a microcomputer to read data from ethernet and send it by wifi at the same time? Hello, everyone. I am new to

2017-06-16 10:12:47 -0600 asked a question Is there an alternative way to connect to machines through the same ROS?

Is there an alternative way to connect to machines through the same ROS? I want to connect two microcomputers (Odroid or

2017-06-16 10:04:00 -0600 asked a question How to use a microcomputer to read data from ethernet and send it by wifi at the same time?

How to use a microcomputer to read data from ethernet and send it by wifi at the same time? Hello, everyone. I am new to

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2017-05-09 11:31:18 -0600 asked a question How to connect VLP-16 (confused about the tutorial)

How to connect VLP-16 (confused about the tutorial) I try to connect VLP-16 to indigo in four ways, but all failed and l

2017-05-09 09:59:08 -0600 commented answer VLP16 - ROS Indigo- Velodyne poll() timeout Issue

I have the same problem. I cloned the latest source from github as http://answers.ros.org/question/226594/how-do-i-build

2017-05-09 09:09:02 -0600 commented answer How to connect VLP-16 velodyne to indigo?

It doesn't make any difference. Still no data is published

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2017-05-08 13:33:12 -0600 asked a question How to connect VLP-16 velodyne to indigo?

How to connect VLP-16 velodyne to indigo? Under Ubuntu 14.04, indigo, My situation now is: sudo ifconf