From d968ffca3fa5ddb73987c8682b71da367287b786 Mon Sep 17 00:00:00 2001
From: Bob Ding <4655609+bobd988@users.noreply.github.com>
Date: Thu, 29 Feb 2024 08:19:15 -0800
Subject: [PATCH] Update README.md

---
 examples/c++-ros2-dataflow/README.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/examples/c++-ros2-dataflow/README.md b/examples/c++-ros2-dataflow/README.md
index 32c844a3..ac117fd9 100644
--- a/examples/c++-ros2-dataflow/README.md
+++ b/examples/c++-ros2-dataflow/README.md
@@ -12,7 +12,7 @@ This examples requires a sourced ROS2 installation.
   - Install the turtlesim package
   - Start the turtlesim node through `ros2 run turtlesim turtlesim_node`
 
-## Running
+## Running turtlesim example
 
 
 From terminal 1 , sourcing the ROS2 installation and start ROS2 turtlesim window
@@ -21,8 +21,9 @@ source /opt/ros/galactic/setup.bash
 ros2 run turtlesim turtlesim_node
 ```
 
-From terminal 2 from dora folder 
+From terminal 2 from dora folder. Note the source command here is necessary as this allow ROS2 message types to be found and compile dynamically.
 ```
+source /opt/ros/galactic/setup.bash
 cargo run --example cxx-ros2-dataflow --features ros2-examples
 ```
 And you will see the turtle move a few steps.