p2os connection

edit

I have 3 pioneers, only one of which is running p2os. The two running Aria are all set up in terms of teleop and working with the navigation stack, I am having a problem with the Pioneer 2 with p2os. I followed the tutorials carefully, but I have an error I can't seem to fix. I have an external laptop hooked up via USB2Serial connection. I have a launch script like so

 <node name="p2os" pkg="p2os_driver" type="p2os" ns="$(env NAMESPACE)" output="screen" >
      <param name="port" value="/dev/Aria" />
      <remap from="/cmd_vel" to="/virtual_joystick/cmd_vel" />
      <remap from="pose" to="odom" />
   </node>

When I run the launch, it outputs the following message repeatedly for about a minute before crashing. I have tried changing permissions on my symlink, on ttyUSB*, and directly on the bus port its on, to no avail.

[ERROR] [1347049242.964984100][/robot_brain_3/p2os]: Error reading packet header from robot connection: P2OSPacket():Receive():read(): [Receive]

Also if you look on the display screen on the robot, it says No Conn 9.6kb p2os v1.p 14.8 Specifically the no conn presumably means no connection...but the output is different than if I just turned off the pioneer. It is clearly receiving something.

Oh and running the dashboard works, but it just spams the error in it's little logger, can't get any other useful information.

Any ideas?

Edit* Sample process

sudo apt-get install ros-electric-p2os
sudo chmod 777 -R /dev/ttyUSB0
sudo chmod 777 -R /dev/Aria
sudo chmod 777 -R /dev/bus/usb/001/126  #these are all the same, just for sanity's sake
roslaunch p2os_launch sample_p2os.launch #where sample_p2os.launch is a script like above

[INFO] [/robot_brain_3/p2os]: using serial [port]: [/dev/Aria] [P2OSNODE]
[INFO] [/robot_brain_3/p2os]: P2OS connection opening serial port /dev/Aria...[Setup]
[ERROR] [/robot_brain_3/p2os]: Error reading packet header from robot connection: P2OSPacket():Receive():read(): [Receive]
[ERROR] [/robot_brain_3/p2os]: Error reading packet header from robot connection: P2OSPacket():Receive():read(): [Receive]
[ERROR] [/robot_brain_3/p2os]: Error reading packet header from robot connection: P2OSPacket():Receive():read(): [Receive]