Added blog post about micro-ROS at ERF 2021 (#318)

* added blog post of ERF 2021

Signed-off-by: Jan Staschulat <jan.staschulat@de.bosch.com>

* added &euml; in the name 'Anaelle' Sarazin

* Updated failing URL

* Update _posts/2021-04-13-ERF2021.md

Co-authored-by: Pablo Garrido <pablogs9@gmail.com>

* Update _posts/2021-04-13-ERF2021.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

* embedded slides and youtube video

Signed-off-by: Jan Staschulat <jan.staschulat@de.bosch.com>

* Update _posts/2021-04-13-ERF2021.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

* Update _posts/2021-04-13-ERF2021.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

Co-authored-by: Pablo Garrido <pablogs9@gmail.com>
Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

Author: 3 people

_docs/concepts/rtos/comparison/index.md

@@ -22,18 +22,18 @@ The comparison regards the features listed below:
 * POSIX level support
 
 **Key questions:**
-* Evaluation POSIX-compliance of RTOS. 
+* Evaluation POSIX-compliance of RTOS.
 * What is the effort in providing an additional layer for non-POSIX RTOS regarding micro-ROS or ROS 2?
 * Support of RTOS for specific HW platforms
 
 ## Table of Comparisons
 
-| **OS**                                                       | **NuttX**              | **FreeRTOS**                                                                   | **Zephyr**                                                        |
+| **OS**                                                       | **NuttX**                                | **FreeRTOS**                                                                                                             | **Zephyr**                                                                                      |
 | ------------------------------------------------------------ | ---------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- |
 | **Feature**                                                  |                                          |                                                                                                                          |                                                                                                 |
 | **Standardization**                                          |                                          |                                                                                                                          |                                                                                                 |
 | POSIX                                                        | yes                                      | partial                                                                                                                  | partial                                                                                         |
-| POSIX.1 <sup>1</sup>                                         | [yes](http://nuttx.org/)                 | [wrapper](https://interactive.freertos.org/hc/en-us/community/posts/210029046-POSIX-Wrapper-for-FreeRTOS)                | partial                                                                                         |
+| POSIX.1 <sup>1</sup>                                         | [yes](http://nuttx.org/)                 | [wrapper](https://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_POSIX/index.html)                                         | partial                                                                                         |
 | POSIX.1b <sup>2</sup>                                        | yes                                      | partial                                                                                                                  | partial                                                                                         |
 | POSIX.1c <sup>3</sup>                                        | yes                                      | yes                                                                                                                      | partial                                                                                         |
 |                                                              |                                          |                                                                                                                          |                                                                                                 |

_posts/2021-04-13-ERF2021.md

@@ -0,0 +1,25 @@
+---
+title: micro-ROS at European Robotics Forum 2021
+author: JanStaschulat
+---
+
+On April 13th 2021, we presented micro-ROS at the [European Robotics Forum 2021](https://www.eu-robotics.net/robotics_forum/) in a dedicated workshop organized by several partners of this project. First, Francesca Finoccharo (eProsima) presented in detail the micro-ROS architecture, the supported platforms, several demonstrations and reported on new features: A versatile API for custom transports, continuous fragment mode, static memory pools in the RMW and time synchronization between client and agent:
+
+<embed src="/download/2021-04-13-ERF-eprosima.pdf" type="application/pdf" width="100%" height="450px"/>
+
+Then, Jan Staschulat (Bosch) gave an overview of the RCLC API with a code example and highlighted the deterministic behavior of the RCLC Executor: 
+
+<embed src="/download/2021-04-13-ERF-bosch.pdf" type="application/pdf" width="100%" height="450px"/>
+
+Two customers of micro-ROS presented their industrial use-cases and emphasized the benefit of micro-ROS: First, Ana&euml;lle Sarazin (WYCA Robotics) presented "Elodie and micro-ROS":
+
+<embed src="/download/2021-04-13-ERF-wyca.pdf" type="application/pdf" width="100%" height="450px"/>
+
+And, secondly, Tomasz Rokosz (Hydra System) presented "micro-ROS enabled GNSS receiver":
+
+<embed src="/download/2021-04-13-ERF-hydra.pdf" type="application/pdf" width="100%" height="450px"/>
+
+Video of the demo by Hydra System:
+<iframe width="560" height="315" src="https://www.youtube.com/embed/hTEnTju1Qkg" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+
+Finally, a panel discussion with Pablo Garrido Sanchez (eProsima), Alexandre Malki (PIAP), Jan Staschulat (Bosch), Ana&euml;lle Sarazin (WYCA Robotics) and Tomasz Rokosz (Hydra System) stimulated a very lively participation of the audience.