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The examples are using generic command line tools. If you want to send from a file you can probably set it up to pip the arguments into the rosservice call using xargs. But more likely I'd recommend writing the few line rclpy script to load the file and call the service call. If you'd like to contribute a generic version of that helper script to the gazebo_ros_pkgs that would be even better.

The examples are using generic command line tools. If you want to send from a file you can probably set it up to pip pipe the arguments into the rosservice call using xargs. But more likely I'd recommend writing the few line rclpy script to load the file and call the service call. If you'd like to contribute a generic version of that helper script to the gazebo_ros_pkgs that would be even better.