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HELLO...

Can anybody explain step by step how can ı do this project like video ???

https://www.youtube.com/watch?feature=player_embedded&v=pCF7P7u8pDk

I have Rplidar ROS library.

https://github.com/robopeak/rplidar_ros

and ı have RVIZ on ubuntu / indigo

nobody know as exactly .

İs anybody explain this project step by step on pictures or video.

ı AM DOİNG LİKE THİS :

$ roslaunch rplidar_ros rplidar.launch $ roslaunch hector_slam_launch tutorial.launch ( it is started RVIZ program)

this is working and starting publish lidar scan data. I added LASER_SCAN and MAP tools on RVIZ display.

if ı write Laser_Scan -> Topic "/scan" and GLobal Options -> fixed frame "laser" , I can see LIDAR data on RVİZ on rviz display.

BUT !!!! f ı write Laser_Scan -> Topic "/scan" and GLobal Options -> fixed frame "map" , I can NOT see LIDAR data on RVİZ on rviz display. and I see this error:

Transform [sender=unknown_publisher] For frame [laser]: Fixed Frame [map] does not exist please solve this problem. help me.


Originally posted by osmancns on ROS Answers with karma: 153 on 2015-05-17

Post score: 0

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3 Answers 3

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I suggest reading about the Hector SLAM from this page and how to set up for your robot or do laser sensor only mapping. Of course do the basic ROS tutorial first. Learning by doing is the best practice. Try first and if you fail ask the community for help. ROS tutorials and Hector SLAM has well written wiki page and tutorials for any beginner level ROS user to understand clearly and concisely.


Originally posted by AlexR with karma: 654 on 2015-05-17

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Post score: 1


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Comment by pallavbakshi on 2017-02-03:
HI, I think those links are very basic. Can you give link to some better tutorials?

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The Problem is that you dont have a transform from laser to map, post your tf tree please:

rosrun tf view_frames

evince frames.pdf

Originally posted by felixwatzlawik with karma: 201 on 2015-05-20

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Comment by osmancns on 2015-05-21:
ı run your code and result: "NO TF DATA RECEIVED"

my codes like this: -$ roscore (no error) -$ roslaunch rplidar_ros rplidar.launch (RPLidar health status : 0) -$ roslaunch hector_slam_launch tutorial.launch (no error)

ı can see laser frame on rviz no map what is the problem ı couldnt find .

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hi

This is my blog but in Chinese.

There are steps about hector slam in the article.

https://hollyqood.wordpress.com/2015/12/01/ros-slam-2-hector-slam-2d%E5%9C%B0%E5%9C%96%E5%BB%BA%E7%BD%AE/

I guess that was no laser data because of the com port permission.

sudo chmod 666 /dev/ttyUSB0

Please that me know if you were success. :)

Alyson


Originally posted by YingHua with karma: 196 on 2015-12-14

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Comment by Bill5785 on 2017-02-15:
Thank you. I found this helpful!

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