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2022-07-07 08:03:00 【Absent mindedness】
First of all, don't send it only once topic. Its second priority is ros::NodeHandle The problem of . Pay attention to the sending and receiving NodeHandle=n; Be consistent .
No, one is
ros::NodeHandle n;The other is
ros::NodeHandle n("~");It will lead to wrong topics for sending and receiving .
Want to know the details , You can refer to
ROS in NodeHandle nh And NodeHandle nh(“~“) difference _ Retro Blue blog -CSDN Blog
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