| ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
Here are the links to official tutorial:
publisher example code with rosserial_arduino
publisher example code in ubuntu
The examples are different from each other with regard to publisher. I am curious about why ?
Is publisher in arduino using C libraries of ROS instead of those of C++, in order to save more storage for arduino board?
In short, the rosserial libraries are completely different from the roscpp libraries that run on Linux.
The API is optimized to save space and avoid copying messages, because the Arduino has so little memory. Even small messages can take upwards of 100 bytes, and on a processor such as the AtMega 168 or 328 that only has 1k or 2k of memory, that is a significant percentage of the overall system memory.
The API is also optimized to avoid memory allocations (calls to malloc or new), because memory allocation on embedded platforms such as the Arduino is generally a bad idea (memory leaks are more likely to crash your program, overwrite your stack, or there simply isn't an allocator at all!)
rosserial_arduino is optimized to work over a serial cable, so the protocol is slightly different, and the API setup is designed around using a serial port instead of supplying a node name.
Asked: 2017-01-06 21:30:18 -0500
Seen: 124 times
Last updated: Jan 07 '17
ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
