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Hi @Scott,

I think I found the problem. The ROS std_msgs/String message type requires a "data" keyword before the actual string. I just tried modifying your HTML code with the following form of the publish command and it worked for me under ROS Electric:

  connection.publish('/recognizer/output', 'std_msgs/String', '{"data":' + '"Hello World"' + '}');

--patrick

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