Connecting a motor controller to ROS

edit

I have installed a driver to connect ROS with the AX2550 motor controller ( https://github.com/wjwwood/ax2550 ).

After connecting the motor controller and enabling permissions, I get this error.

rosrun ax2550 ax2550_node

(info): AX2550 connecting to port /dev/ttyUSB0

(error): Failed to connect to the AX2550: x{o??

[(info): Will try to reconnect to the AX2550 in 5 seconds.

I get this error regardless of what device is connected to the USB port.