joint_states messages different

edit

Hello,

I have a custom 6DOF arm that I'm trying to interface with moveit. I have created the URDF and the model, and I have loaded it into rviz.

I have made a lot of progress with it I think. I'm using ros indigo on ubuntu 14.04

I subscribe to the joint_states topic on my arduino. Using the arduino code I am able to individually control each joint using the joint state sliders when I run the display.launch

I've completed the moveit configuration and it loads with no problems in rviz, and I can plan movements, etc.

however when my arduino subscribes to the joint_states topic at this point, I get errors in rosserial saying [ERROR] [WallTime: 1479872259.522084] Message from ROS network dropped: message larger than buffer.

What is different with these messages than the ones generated from display.launch?

I performed some investigation and found something interesting:

This is the message from when I use moveit demo.launch

header: 
  seq: 954
  stamp: 
    secs: 1479873407
    nsecs: 957350015
  frame_id: ''
name: ['shoulder_base', 'upper_arm_shoulder', 'elbow_upper_arm', 'forearm_elbow', 'wrist_forearm', 'gripper_wrist', 'left_jaw_gripper', 'right_jaw_gripper']
position: [4.435017290525138e-05, 9.012486469545027e-05, 3.372531827300197e-05, 5.395870120266208e-05, 4.7403243313592324e-05, 0.8750411991072651, 0.0, 0.0]
velocity: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
effort: []

and this is the message when I use display.launch

header: 
  seq: 228
  stamp: 
    secs: 1479873728
    nsecs: 257888078
  frame_id: ''
name: ['shoulder_base', 'upper_arm_shoulder', 'elbow_upper_arm', 'forearm_elbow', 'wrist_forearm', 'gripper_wrist', 'left_jaw_gripper', 'right_jaw_gripper']
position: [0.0, 0.0, 0.0, 0.0, 0.0, 1.2491756999999999, 0.0, 0.0]
velocity: []
effort: []

why the differences, and more importantly, can I make the position data the same data types/precision?