Could not start multiple turtlebot3
I run ROS_NAMESPACE=tb3_1 roslaunch turtlebot3_bringup turtlebot3_robot.launch multi_robot_name:="tb3_1" set_lidar_frame_id:="tb3_1/base_scan"
and ROS_NAMESPACE=tb3_2 roslaunch turtlebot3_bringup turtlebot3_robot.launch multi_robot_name:="tb3_2" set_lidar_frame_id:="tb3_2/base_scan"
to start two turtlebot3 at the same time, but come across the warning message:
[WARN][1534469613.765671]:Inbound TCP/IP connection failed: connection from sender terminated before handshake header received. 0 bytes were received. Please check sender for additional details.
And the TF tree only show one turtlebot3.