Update documentation and structure

.github/workflows/build.yml

@@ -33,7 +33,7 @@ jobs:
           git clone https://github.com/PX4/px4_msgs.git -b master src/px4_msgs
       - name: Build package
         run: |
-          cd ~/colcon_ws/src/px4_ros_com/scripts
+          cd ~/colcon_ws/src/px4_ros_com/px4_ros_com/scripts
           ./build_ros2_workspace.bash --verbose --no_ros1_bridge --ros_distro ${{ matrix.ros2_distro }} --ros_path /opt/ros/${{ matrix.ros2_distro }}/setup.bash
       # - name: Build PX4 Firmware
       #   run: |

.gitignore

@@ -1,2 +0,0 @@
-src/micrortps_agent/
-scripts/__pycache__

README.md

@@ -1,3 +1,24 @@
-# tbd
+# PX4-ROS2 bridge
 
-main repo readme
+[![GitHub license](https://img.shields.io/github/license/PX4/px4_ros_com.svg)](https://github.com/PX4/px4_ros_com/blob/master/LICENSE) [![GitHub (pre-)release](https://img.shields.io/github/release-pre/PX4/px4_ros_com.svg)](https://github.com/PX4/px4_ros_com/releases/tag/beta) [![DOI](https://zenodo.org/badge/142936318.svg)](https://zenodo.org/badge/latestdoi/142936318) [![Build and Test package](https://github.com/PX4/px4_ros_com/workflows/Build%20and%20Test%20package/badge.svg?branch=master)](https://github.com/PX4/px4_ros_com/actions)
+
+This repository assembles the microRTPS bridge to bridge between PX4 and ROS2 and examples on how to use it. More documentation on the interface can be found [here](https://docs.px4.io/master/en/ros/ros2.html).
+
+
+## Prerequisites
+
+Check the [RTPS/ROS2 Interface](https://dev.px4.io/en/middleware/micrortps.html) section on the PX4 Devguide and [setup instructions](https://docs.px4.io/master/en/ros/ros2_comm.html#installation-setup)for details on how to install the required dependencies:
+
+- Install [FastDDS](https://docs.px4.io/master/en/ros/ros2_comm.html#install-fast-dds)
+- Install [ROS2](https://docs.px4.io/master/en/ros/ros2_comm.html#install-ros-2)
+
+
+## Bug tracking and feature requests
+
+Use the [Issues](https://github.com/PX4/px4_ros_com/issues) section to create a new issue. Report your issue or feature request [here](https://github.com/PX4/px4_ros_com/issues/new).
+
+
+## Questions and troubleshooting
+
+Reach the PX4 development team on the `#messaging` or `#ros` PX4 Slack channels:
+[![Slack](https://px4-slack.herokuapp.com/badge.svg)](http://slack.px4.io)

examples/README.md

@@ -1,32 +1,58 @@
 # Examples
 
-This directory contains a set of examples application for the PX4-ROS2 bridge. All examples are intended to demonstrate basic interactions between PX4 and ROS2. Feel free to play with the code, extend it and copy it into your own project.
+This directory contains a set of examples application for the PX4-ROS2 bridge. All examples are intended to demonstrate basic interactions between PX4 and ROS2 by sending or receiving [px4_msgs](https://github.com/PX4/px4_msgs).
+Feel free to play with the code, extend it and copy it into your own project.
 
-It is assumed that a reads has a basic understanding of running ROS2 applications as well as PX4.
+- We assume that your have a basic understanding of running [ROS2](https://docs.ros.org/) applications as well as [PX4](https://docs.px4.io/master/en/).
 
-# Layout
+- Also make sure you have build the [px4_ros_com](../px4_ros_com#install) package successfully.
 
-There are several separate examples. Each example assembles its own executable and can be used standalone to interact with a PX4 vehicle from your ROS2 environment.
+## Layout
 
-The examples are structured:
+There are several separate examples packages. Each example package assembles its own executables, where each executable can be used in a standalone fashion to interact with a PX4 vehicle from your ROS2 environment.
 
-* `listeners` 
+The examples are structured (by package and executable):
+
+* [listeners](./listeners): a set of short examples to read data from PX4 in a ROS2 application
+
+    - sensor_combined_listener
+    - vehicle_odometry_listener
+
+* [publishers](./publishers): a set of short examples publishing messages from ROS2 towards PX4
+
+    - debug_vect_publisher
+    - arm_publisher
+    - disarm_publisher
+    - takeoff_publisher
+    - land_publisher
+
+* [offboard](./offboard): a more complex example that arms a robots and sends it to a defined position
 
-   ...
+    - offboard_control
+
+
+## Using Examples
+
+All examples are designed to work with a most possible variety of robots. This can be a multirotor, fixed-wing or VTOL flying robot, a rover or boat. While the examples work on most robots right-away, the are designed to wok in simulation. Maybe you need to adapt the bridge configuration or topic names.
 
-* `publisher` ...
+Usually an example needs two things
 
-* `offboard` ...
+1. The simulated robot. E.g.:
 
+   ```
+   user@ubuntu:~/PX4-Autopilot$ make px4_sitl_rtps gazebo_iris
+   ```
 
-# Using Examples
+2. The microRTPS agent:
 
-...
+   ```
+   user@ubuntu:~/colcon-ws$ micrortps_agent -t UDP
+   ```
 
-# Copying Examples
+Detailed instructions and specific limitations will be in the README file for each package or in the section related to a specific binary in the package.
 
-...
+Read about more robots and simulated worlds [here](https://docs.px4.io/master/en/simulation/gazebo.html).
 
-# Contributing Examples
+## Bug tracking and feature requests
 
-...
+Use the [Issues](https://github.com/PX4/px4_ros_com/issues) section to create a new issue. Report your issue or feature request [here](https://github.com/PX4/px4_ros_com/issues/new).

examples/listeners/CMakeLists.txt

@@ -12,14 +12,14 @@ find_package(px4_msgs REQUIRED)
 add_executable(sensor_combined_listener src/01_sensor_combined_listener.cpp)
 ament_target_dependencies(sensor_combined_listener rclcpp px4_msgs)
 
-add_executable(vehicle_gps_position_listener src/02_vehicle_gps_position_listener.cpp)
-ament_target_dependencies(vehicle_gps_position_listener rclcpp px4_msgs)
+add_executable(vehicle_odometry_listener src/02_vehicle_odometry_listener.cpp)
+ament_target_dependencies(vehicle_odometry_listener rclcpp px4_msgs)
 
 ament_package()
 
 install(
     TARGETS
         sensor_combined_listener
-        vehicle_gps_position_listener
+        vehicle_odometry_listener
     DESTINATION 
         lib/${PROJECT_NAME})

examples/listeners/README.md

@@ -1,3 +1,91 @@
-# tbd
+# Listener Examples
+
+This package contains two executables that subscribe to PX4 robot data and print it to the screen. 
+
+
+For both examples start any robot, e.g.
+
+```
+user@ubuntu:~/PX4-Autopilot$ make px4_sitl_rtps gazebo_boat
+```
+
+in one terminal and in a new terminal the bridge agent
+
+```
+user@ubuntu:~/colcon-ws$ micrortps_agent -t UDP
+```
+
+## sensor_combined_listener
+
+The `sensor_combined_listener` binary subscribes to the ROS2 message [SensorCombined](https://github.com/PX4/px4_msgs/blob/master/msg/SensorCombined.msg) under the topic `fmu/sensor_combined/out`. You can find the related uORB message definition on the PX4 repository under [sensor_combined](https://github.com/PX4/PX4-Autopilot/blob/master/msg/sensor_combined.msg).
+
+This message gives you the accelerometer and gyrometer data of your PX4 robot.
+
+Run 
+
+```
+user@ubuntu:~/colcon-ws$ ros2 run px4_ros_com_listener_examples sensor_combined_listener
+```
+
+You should see something like this:
+
+```
+user@ubuntu:~/colcon-ws$ ros2 run px4_ros_com_listener_examples sensor_combined_listener 
+Starting sensor_combined listener node...
+
+
+RECEIVED SENSOR COMBINED DATA
+=============================
+ts: 1634661989636389
+gyro_rad[0]: 0.00133158
+gyro_rad[1]: 0.0015979
+gyro_rad[2]: 0.000798948
+gyro_integral_dt: 4000
+accelerometer_timestamp_relative: 0
+accelerometer_m_s2[0]: -0.00957681
+accelerometer_m_s2[1]: -0.0814027
+accelerometer_m_s2[2]: -9.65941
+accelerometer_integral_dt: 4000
+```
+
+If you start another terminal, you can see the same data with
+
+```
+user@ubuntu:~/colcon-ws$ ros2 topic echo fmu/sensor_combined/out
+```
+
+
+## vehicle_odometry_listener
+
+The `vehicle_odometry_listener` binary subscribes to the ROS2 message [VehicleOdometry](https://github.com/PX4/px4_msgs/blob/master/msg/VehicleOdometry.msg) under the topic `fmu/sensor_combined/out`. You can find the related uORB message definition on the PX4 repository under [vehicle_odometry](https://github.com/PX4/PX4-Autopilot/blob/master/msg/vehicle_odometry.msg).
+
+This message gives you the local position, orientation, velocities and their covariances.
+
+Run 
+
+```
+user@ubuntu:~/colcon-ws$ ros2 run px4_ros_com_listener_examples vehicle_odometry_listener
+```
+
+You should see something like this:
+
+```
+user@ubuntu:~/colcon-ws$ ros2 run px4_ros_com_listener_examples vehicle_odometry_listener 
+Starting vehicle_odometry listener node...
+
+
+RECEIVED VEHICLE ODOMETRY DATA
+==================================
+timestamp: 1634662773746560
+position: -0.00876204, -0.00276313, -0.0202104
+velocity: -0.0124731, -0.0161834, 0.0285649
+orientation: 0.709173, -0.00153102, 0.003132, 0.705025
+angular vel: 0.00109032, -0.000831208, 0.000450864
+```
+
+If you start another terminal, you can see the same data with
+
+```
+user@ubuntu:~/colcon-ws$ ros2 ros2 topic echo fmu/vehicle_odometry/out
+```
 
-listeners readme

examples/listeners/src/01_sensor_combined_listener.cpp

@@ -48,37 +48,37 @@
 class SensorCombinedListener : public rclcpp::Node
 {
 public:
-	explicit SensorCombinedListener() : Node("sensor_combined_listener") {
-		subscription_ = this->create_subscription<px4_msgs::msg::SensorCombined>(
-			"fmu/sensor_combined/out", 10,
-			[this](const px4_msgs::msg::SensorCombined::UniquePtr msg) {
-			std::cout << "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
-			std::cout << "RECEIVED SENSOR COMBINED DATA"   << std::endl;
-			std::cout << "============================="   << std::endl;
-			std::cout << "ts: "          << msg->timestamp    << std::endl;
-			std::cout << "gyro_rad[0]: " << msg->gyro_rad[0]  << std::endl;
-			std::cout << "gyro_rad[1]: " << msg->gyro_rad[1]  << std::endl;
-			std::cout << "gyro_rad[2]: " << msg->gyro_rad[2]  << std::endl;
-			std::cout << "gyro_integral_dt: " << msg->gyro_integral_dt << std::endl;
-			std::cout << "accelerometer_timestamp_relative: " << msg->accelerometer_timestamp_relative << std::endl;
-			std::cout << "accelerometer_m_s2[0]: " << msg->accelerometer_m_s2[0] << std::endl;
-			std::cout << "accelerometer_m_s2[1]: " << msg->accelerometer_m_s2[1] << std::endl;
-			std::cout << "accelerometer_m_s2[2]: " << msg->accelerometer_m_s2[2] << std::endl;
-			std::cout << "accelerometer_integral_dt: " << msg->accelerometer_integral_dt << std::endl;
-		});
-	}
+    explicit SensorCombinedListener() : Node("sensor_combined_listener") {
+        subscription_ = this->create_subscription<px4_msgs::msg::SensorCombined>(
+            "fmu/sensor_combined/out", 10,
+            [this](const px4_msgs::msg::SensorCombined::UniquePtr msg) {
+            std::cout << "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
+            std::cout << "RECEIVED SENSOR COMBINED DATA"   << std::endl;
+            std::cout << "============================="   << std::endl;
+            std::cout << "ts: "          << msg->timestamp    << std::endl;
+            std::cout << "gyro_rad[0]: " << msg->gyro_rad[0]  << std::endl;
+            std::cout << "gyro_rad[1]: " << msg->gyro_rad[1]  << std::endl;
+            std::cout << "gyro_rad[2]: " << msg->gyro_rad[2]  << std::endl;
+            std::cout << "gyro_integral_dt: " << msg->gyro_integral_dt << std::endl;
+            std::cout << "accelerometer_timestamp_relative: " << msg->accelerometer_timestamp_relative << std::endl;
+            std::cout << "accelerometer_m_s2[0]: " << msg->accelerometer_m_s2[0] << std::endl;
+            std::cout << "accelerometer_m_s2[1]: " << msg->accelerometer_m_s2[1] << std::endl;
+            std::cout << "accelerometer_m_s2[2]: " << msg->accelerometer_m_s2[2] << std::endl;
+            std::cout << "accelerometer_integral_dt: " << msg->accelerometer_integral_dt << std::endl;
+        });
+    }
 
 private:
-	rclcpp::Subscription<px4_msgs::msg::SensorCombined>::SharedPtr subscription_;
+    rclcpp::Subscription<px4_msgs::msg::SensorCombined>::SharedPtr subscription_;
 };
 
 int main(int argc, char *argv[])
 {
-	std::cout << "Starting sensor_combined listener node..." << std::endl;
-	setvbuf(stdout, NULL, _IONBF, BUFSIZ);
-	rclcpp::init(argc, argv);
-	rclcpp::spin(std::make_shared<SensorCombinedListener>());
+    std::cout << "Starting sensor_combined listener node..." << std::endl;
+    setvbuf(stdout, NULL, _IONBF, BUFSIZ);
+    rclcpp::init(argc, argv);
+    rclcpp::spin(std::make_shared<SensorCombinedListener>());
 
-	rclcpp::shutdown();
-	return 0;
+    rclcpp::shutdown();
+    return 0;
 }