Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Running a raspberry pi(wiring pi) node with roslaunch

asked 2018-08-04 14:00:53 -0500

Prof. xavier
35 ●16 ●20 ●25

updated 2022-01-31 08:50:27 -0500

lucasw

8729 ●137 ●239 ●256 https://github.com/lucasw

I am having trouble to run a node present in /ros_workspace/devel/lib/blink where blink is the package and this directory contains the blink executable, this executable is ran with root permission, I dont understand the work around with roslaunch with such files.

How can I run this with one roslaunch with other nodes in the bot.

Please let me know any other info that maybe needed to solve this. thank you.

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2018-08-04 16:14:08 -0500

dan
855 ●52 ●62 ●76 http://www.fellowrobots.com/

Did you source the workspace?

Normally, the source call is made in ~/.bashrc, but you can also just use it from the command line.

For ROS kinetic:

source /opt/ros/kinetic/setup.bash

and, in your case, assuming that your catkin workspace is actually ~/ros_workspace:

source ~/ros_workspace/devel/setup.bash

Then you should be able to do

roslaunch blink blink

edit flag offensive delete link

Comments

how can I make the launch automatically ask for root access and automatically run as root, as wiringpi cpp requires root access.

Prof. xavier ( 2018-08-05 13:20:02 -0500 )edit

That's a common problem with wiringpi and ROS. You will have to go through the hassle of setting permissions on /dev/mem and /dev/gpiomem. I suggest considering alternatives like pigpio or RPi.gpio where the permissions are already setup.

dan ( 2018-08-06 01:57:17 -0500 )edit

add a comment

Question Tools

Stats

Asked: 2018-08-04 14:00:53 -0500

Seen: 842 times

Last updated: Aug 04 '18

Running a raspberry pi(wiring pi) node with roslaunch edit

1 Answer

Comments

Question Tools

Stats

Related questions

Running a raspberry pi(wiring pi) node with roslaunch