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- Ten-Minute Guide to rosbridge
- More information is available from:
- http://ros.org/wiki/rosbridge (the documentation page for rosbridge on ros.org)
- http://ros.org/wiki/rosjs (the ros.js documentation page)
- and by writing tjay@cs.brown.edu
- After installing ROS ( http://www.ros.org/wiki/ROS/Installation ), rosbridge is available either:
- 1) By apt-get repository (after installing the ROS apt sources) via:
- sudo apt-get install ros-electric-brown-remotelab
- or
- 2) Via SVN checkout:
- svn co https://brown-ros-pkg.googlecode.com/svn/trunk/experimental/rosbridge rosbridge
- to launch rosbridge:
- rosrun rosbridge rosbridge.py
- by default rosbridge runs on port 9090 .
- To talk to rosbridge, use JSON ( http://www.json.org/ ) messages wrapped in byte 0 and byte 255 (you may optionally include a newline before the 255. Communication from the server will come similarly wrapped, and with a newline before the 255. rosbridge only supports pure ASCII messages.
- To publish:
- {"receiver":"/topic","msg":{"fieldname":"value"},"type":"ros/type"}
- To make a service call:
- {"receiver":"/service","msg":["in","order","arguments"]}
- Most of the functionality of the ROS C++ and Python API is available as pseudo-services provided by rosbridge. See the ros.js tutorial for more information.
- Example:
- {"receiver":"/rosbridge/subscribe","msg":["/topic",-1,"type"]}
- subscribes to the /topic regardless of whether it currently exists.
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