Update ros_interface.md, tutorials/real_robot.md, tutorials/simulation.md,...

Update ros_interface.md, tutorials/real_robot.md, tutorials/simulation.md, README.md, developers.md files

README.md

@@ -32,4 +32,4 @@ whenever you need to use the robot.
 
 # Developers
 
-For advanced users and developers, [here<to_do>]() there is a more in depth information about the robot and all its dependencies.
+See [developers](developers.md) for advanced users and developers.

developers.md

+# Developers
+

ros_interface.md

+# ROS Interface
+
+## Topics
+
+### Published
+
+* /helena/odom ([nav_msgs/Odometry](http://docs.ros.org/api/nav_msgs/html/msg/Odometry.html)): platform odometry
+
+### Subscribed
+
+* /helena/cmd_vel ([geometry_msgs/Twist](http://docs.ros.org/api/geometry_msgs/html/msg/Twist.html)): velocity commands as linear speed (linear.x) and angular speed (angular.z)
+
+## Services
+
+### Servers
+
+*
+
+### Clients
+
+*
+
+## Actions
+
+### Servers
+
+*
+
+### Clients
+
+*
+

tutorials/real_robot.md

@@ -6,4 +6,4 @@ The robot's on-board computer already has all the necessary ROS nodes to operate
 
 At this point, you should have acces to all the topic, services and actions provided by the robot.
 
-A complete list of all ROS interfaces is shown here: [to_do]().
\ No newline at end of file
+A complete list of all ROS interfaces is shown here: [ROS_interface](../ros_interface.md).
\ No newline at end of file

tutorials/simulation.md

@@ -61,4 +61,4 @@ roslaunch iri_helena_gazebo sim_sample.launch rviz:=true world_name:=willow
 
 This command should launch the robot with all its sensors in an example world, shown in the Gazebo gui, and Rviz showing sensor data. 
 
-A complete list of all ROS interfaces is shown here: [to_do]().
\ No newline at end of file
+A complete list of all ROS interfaces is shown here: [ROS_interface](../ros_interface.md).
\ No newline at end of file