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Assuming it built successfully, you probably tried to run it in a different terminal environment. Since the cwru-ros-pkg checkout (which contains the xv_11_laser_driver) is not part of the system ROS installation, you'll need to do . ~/cwru-ros-pkg/setup.bash in each terminal you want to use the driver in.

Alternatively, you could add . ~/cwru-ros-pkg/setup.bash to your ~/.bashrc to have it automatically included in all terminals.

Assuming it built successfully, you probably tried to run it in a different terminal environment. Since the cwru-ros-pkg checkout (which contains the xv_11_laser_driver) is not part of the system ROS installation, you'll need to do . ~/cwru-ros-pkg/setup.bash in each terminal you want to use the driver in.

Alternatively, you could add . ~/cwru-ros-pkg/setup.bash to your ~/.bashrc to have it automatically included in all terminals.

Assuming it built successfully, you probably tried to run it in a different terminal environment. Since the cwru-ros-pkg checkout (which contains the xv_11_laser_driver) is not part of the system ROS installation, you'll need to do . ~/cwru-ros-pkg/setup.bash in each terminal you want to use the driver in.

Alternatively, you could add . ~/cwru-ros-pkg/setup.bash to your ~/.bashrc to have it automatically included in all terminals.

UPDATE 1: You have to give the driver the path to a valid serial port. If you have no /dev/ttyUSB* devices, are you certain the serial adapter is plugged in connected properly (there may also be some lights on the SparkFun adapter, but I don't recall if those only light when the adapter is communicating or also just when plugged in)? Do you have any /dev/ttyACM* devices?

Assuming it built successfully, you probably tried to run it in a different terminal environment. Since the cwru-ros-pkg checkout (which contains the xv_11_laser_driver) is not part of the system ROS installation, you'll need to do . ~/cwru-ros-pkg/setup.bash in each terminal you want to use the driver in.

Alternatively, you could add . ~/cwru-ros-pkg/setup.bash to your ~/.bashrc to have it automatically included in all terminals.

UPDATE 1: You have to give the driver the path to a valid serial port. If you have no /dev/ttyUSB* devices, are you certain the serial adapter is connected properly (there may also be some lights on the SparkFun adapter, but I don't recall if those only light when the adapter is communicating or also just when plugged in)? Do you have any /dev/ttyACM* devices?

Assuming it built successfully, you probably tried to run it in a different terminal environment. Since the cwru-ros-pkg checkout (which contains the xv_11_laser_driver) is not part of the system ROS installation, you'll need to do . ~/cwru-ros-pkg/setup.bash in each terminal you want to use the driver in.

Alternatively, you could add . ~/cwru-ros-pkg/setup.bash to your ~/.bashrc to have it automatically included in all terminals.

UPDATE 1: You have to give the driver the path to a valid serial port. If you have no /dev/ttyUSB* devices, are you certain the serial adapter is connected properly (there may also be some lights on the SparkFun adapter, but I don't recall if those only light when the adapter is communicating or also just when plugged in)? Do you have any /dev/ttyACM* devices?

Directions for hooking up the laser are here: Connecting the XV-11 Laser to USB

Assuming it built successfully, you probably tried to run it in a different terminal environment. Since the cwru-ros-pkg checkout (which contains the xv_11_laser_driver) is not part of the system ROS installation, you'll need to do . ~/cwru-ros-pkg/setup.bash in each terminal you want to use the driver in.

Alternatively, you could add . ~/cwru-ros-pkg/setup.bash to your ~/.bashrc to have it automatically included in all terminals.

UPDATE 1: You have to give the driver the path to a valid serial port. If you have no /dev/ttyUSB* devices, are you certain the serial adapter is connected properly (there may also be some lights on the SparkFun adapter, but I don't recall if those only light when the adapter is communicating or also just when plugged in)? Do you have any /dev/ttyACM* devices?

Directions for hooking up the laser are here: Connecting the XV-11 Laser to USB

UPDATE 2: The root of the trouble connecting to the serial adapter was a faulty USB cable.

Assuming it built successfully, you probably tried to run it in a different terminal environment. Since the cwru-ros-pkg checkout (which contains the xv_11_laser_driver) is not part of the system ROS installation, you'll need to do . ~/cwru-ros-pkg/setup.bash in each terminal you want to use the driver in.

Alternatively, you could add . ~/cwru-ros-pkg/setup.bash to your ~/.bashrc to have it automatically included in all terminals.

UPDATE 1: You have to give the driver the path to a valid serial port. If you have no /dev/ttyUSB* devices, are you certain the serial adapter is connected properly (there may also be some lights on the SparkFun adapter, but I don't recall if those only light when the adapter is communicating or also just when plugged in)? Do you have any /dev/ttyACM* devices?

Directions for hooking up the laser are here: Connecting the XV-11 Laser to USB

UPDATE 2: The root of the trouble connecting to the serial adapter was a faulty USB cable. As far as launching things in separate terminals, that is completely normal. Your fixed_frame in RVIZ should be neato_laser by default, unless you change the frame_id parameter to something else. It should be available in the drop-down menus once you subscribe to the scan topic.

Regarding the trouble receiving scans, make sure you set the topic after adding a LaserScan display to rviz. The topic defaults to /scan. If you still get that error, in a new terminal, run rostopic list and verify that /scan (or whatever you may have remapped the scan topic to) is in the list. Run rostopic hz /scan to make sure you are getting data (it should report data coming out at either 5 or 10 Hz).

If you still don't get any data, try starting your driver node with the other firmware version (see the documentation for details on that parameter. For a quick check, just try rosrun xv_11_laser_driver neato_laser_publisher _port:=/dev/ttyUSB0 _firmware_version=2_firmware_version:=2 to see if that gets you good looking data in rviz.