fail to get scan data

the map_nav application,use it to connect the turtlebot ,everythings ok.but use it to connect youibot ,I can only get the map data,I cant get scan data and camera data.I have try many method,I still cant get the message.I`m sure the topic name and the data type are right.ps:kinetic.If you have time ,please answer my question.thank you!

if you want camera data,you should launch camera node first ,

like this "roslaunch turtlebot3_bringup turtlebot3_rpicamera.launch",