February 2020
Intermediate to advanced
432 pages
10h 50m
English
Content preview from Hands-On ROS for Robotics Programming
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The rosbag command
This command allows you to save a session and play it back on demand. Let's look at how to do that:
T1 $ roslaunch mygopigo easyDistance.launchT2 $ rosbag record /distance_sensor/distance
Press Ctrl + C in the T2 terminal when you want to end the recording. Type rosbag info <bag filename> into T2 to get information about the recorded file (the default name for the file is composed by the sequence date-time-topic_name, and it is given the .bag extension):
T2 $ rosbag info 2019-08-15-20-36-36_distanceSensor.bagpath: 2019-08-15-20-36-36.bagversion: 2.0duration: 46.0sstart: Aug 15 2019 20:36:37.48 (1565894197.48)end: Aug 15 2019 20:37:23.50 (1565894243.50)size: 14.5 KBmessages: 47compression: none [1/1 chunks]types: sensor_msgs/Range ...