Connect you your NGIMU using your ubuntu => select network.
gedit ~/.bashrc
Paste this to bashrc somewhere.Don't forget to comment these code lines. # export ROS_MASTER_URI=http://localhost:11311 # export ROS_IP=localhost
# Using NGIMU
export ROS_MASTER_URI=http://192.168.1.2:11311
export ROS_HOSTNAME=192.168.1.2
roslaunch ros-ngimu run.launch
roslaunch ros-ngimu run_rviz.launch