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Hi, navidzarrabi

run export ROS_MASTER_URI=http://192.XXX.XXX.XXX:11311 and export ROS_HOSTNAME=192.XXX.XXX.XXX on your robot,192.XXX.XXX.XXX is your robot ip address.

run export ROS_MASTER_URI=http://192.XXX.XXX.XXX:11311 and export ROS_HOSTNAME=192.YYY.YYY.YYY on your PC 192.XXX.XXX.XXX is your robot ip address, 192.YYY.YYY.YYY is your PC ip address.

then, you can do most operations on your pc. such as rviz, rqt_gui.

In fact, i think this makes your pc know where is master and makes your robot know where is itself.It works for me, i hope it works for you,too.