hokuyo at /dev/ttyACM0 change default settings

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Hi everyone,

With our robot we are using a single hokuyo laser scanner for obstacle detection.

As software we are using ROS-Hydro and the Hokuyo node here. We got everything working, but startup is kinda cumbersome:

• Depending on order of bootup the hokuyo will be either /dev/ttyACM0 or /dev/ttyACM1, so we created a udev rule to always have it at /dev/sensors/hokuyo.
• Therefore we always need to set the port before starting up: rosparam set hokuyo_node/port /dev/sensors/hokuyo (taken from here )

Of course, this is scriptable, but I'm looking for a better way to change this in some configuration file or similar.