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.

time interval between messages published on a topic

3.ROS

asked 2018-01-24 00:41:48 -0500

BotLover
5 ●9 ●10 ●14

Hi everyone, I want to calculate time interval between messages that are published on a topic. The topic is /aruco_poses and of type aruco_mapping/ArucoMarker. It has std_msgs/Header field with stamp containing sec and nsec. But I don't know how to access nsec field from the topic. Any idea? Thanks in advance!

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2018-01-24 00:57:40 -0500

Thomas D

4347 ●33 ●65 ●86 http://denewiler.us/cv

You can do this with ROS times and durations: roscpp, rospy. You will have to save the previous message, then when you get a new one you can do double elapsed_time = (msg.header.stamp - prev_msg.header.stamp).toSec() (rospy has similar logic).

edit flag offensive delete link

add a comment

Question Tools

2 followers

Stats

Asked: 2018-01-24 00:41:48 -0500

Seen: 710 times

Last updated: Jan 24 '18

time interval between messages published on a topic edit

1 Answer

Question Tools

Stats

Related questions

time interval between messages published on a topic