examples/rust-ros2-dataflow/README.md

# `rust-ros2-dataflow` Example

This example shows how to publish/subscribe to both ROS2 and Dora. The dataflow consists of a single node that sends random movement commands to the [ROS2 `turtlesim_node`](https://docs.ros.org/en/iron/Tutorials/Beginner-CLI-Tools/Introducing-Turtlesim/Introducing-Turtlesim.html).

## Setup

This examples requires a sourced ROS2 installation.

- To set up ROS2, follow the [ROS2 installation](https://docs.ros.org/en/iron/Installation.html) guide.
- Don't forget to [source the ROS2 setup files](https://docs.ros.org/en/iron/Tutorials/Beginner-CLI-Tools/Configuring-ROS2-Environment.html#source-the-setup-files)
- Follow tasks 1 and 2 of the [ROS2 turtlesim tutorial](https://docs.ros.org/en/iron/Tutorials/Beginner-CLI-Tools/Introducing-Turtlesim/Introducing-Turtlesim.html#id3)
  - Install the turtlesim package
  - Start the turtlesim node through `ros2 run turtlesim turtlesim_node`
- In a separate terminal, start the `/add_two_ints` service: `ros2 run examples_rclcpp_minimal_service service_main`

## Running

After sourcing the ROS2 installation and starting both the `turtlesim` node and the `/add_two_ints` service, you can run this example to move the turtle in random directions:

```
cargo run --example rust-ros2-dataflow --features ros2-examples
```

You should see a few random requests in the terminal where you started the `examples_rclcpp_minimal_service`.