rasp_imu_hat_6dof/launch/imu-pub.launch

<launch>
  <arg name="imu_config_file" default="$(find rasp_imu_hat_6dof)/config/param.yaml"/>
  <node pkg="rasp_imu_hat_6dof" type="imu_node.py" name="imu_node" output="screen">
    <rosparam file="$(arg imu_config_file)" command="load"/>
  </node>
</launch>