CLEARPATH Turtlebot4 User Manual page 112

// Lights on status
bool lights_on_;
};
int main(int argc, char
{
rclcpp::init(argc, argv);
rclcpp::spin(std::make_shared<TurtleBot4FirstNode>());
rclcpp::shutdown();
return 0;
}
Don't forget to build the package again before running the node.
* argv[])