The ros_control package is a powerful tool controlling, above other, differential drive robots. The diff_drive_controller used for this task takes a linear and angular velocity as input and delivers the velocities of the left and right drive wheel as output. The output is retrieved via a hardware_interface.
The gazebo_ros_control plugin for the simulation platform Gazebo has implicitly embedded a hardware_interface, which enables the output of the (simulated) velocities of the left and right drive.
If I start my real hardware_interface and Gazebo at the same time, there are two hardware_interface existing, which leads to an error.
Therefore, my question is whether there is a workaround to start simultaneously Gazebo and the real hardware_interface?
