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.

Revision history [back]

First, check that the baudrate is the same on the arduino and the computer. If thats the case, then check if your rosserial protocol version (noetic, melodic, ...) matches the protocol version used by the arduino. Also check if the arduino is indeed connected to /dev/ttyUSB0. If everything is correctly set up, then maybe the software on the arduino is buggy.

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.