Open Roberta

Open Roberta
Paradigm event-driven, imperative
Designed by Beate Jost, Reihard Budde, Thorsten Leimbach, Achim Kapusta
Developer Fraunhofer IAIS, Media Engineering Department
First appeared 2013 (2013) (test) 2014 (2014) (official)
Stable release beta 1.3.0 / September 8, 2015 (2015-09-08)
Typing discipline dynamic
Implementation language Java, JavaScript, html (NEPO)
OS Windows, Linux, iOS
License Apache License 2
Website www.open-roberta.org
Influenced by
Scratch, Blockly

Open Roberta is the name of a project within the German education initiative "Roberta—Learning with robots", initiated by Fraunhofer IAIS, which is an institute belonging to the Fraunhofer Society. With Open Roberta Fraunhofer IAIS is looking to encourage kids to code by using Lego Mindstorms, a programmable robotics platform. The Cloud-approach of the Open Roberta Lab makes programming easier and minimizes the hurdles for teachers and schools to teach how to code.[1] Open Roberta is free and does not require any installation.[2] The project was initially founded with $1Mio[3][4] by Google.org[5]

Open Roberta Lab

Open Roberta Lab

Open Roberta Lab is cloud-based programming environment. This environment allows children and young people with no technical pre-knowledge to program a LEGO MINDSTORMS [6] EV3 robot. There is a variety of different program blocks available to program the motors, sensors, and the EV3 brick.[7] Open Roberta Lab uses the approach of visual programming. This approach makes it easier - especially for beginners with no experience - to learn how to code. As a cloud based programming environment no installation is needed, any operation system and computer hardware device may be used.[8][9] The big advantage of Open Roberta Lab is, that it can be used with any device (PC, tablet, smartphone) and with any operating system (Mac OS, Windows, Linux). Only a web browser is needed.

Open Source Community

The programming platform Open Roberta Lab is open source developed.[10] Both the software as well as the open source development tools are available on a server of Fraunhofer Society. The development team at Fraunhofer works together with teachers and education experts from the Roberta network. Therefore, also universities and students are involved in the development. It should address especially female students - the guiding principle of the Roberta project.[11]

Programming language NEPO®

NEPO program Hello World

NEPO is a free open source meta programming language that can be used by students, scholars, teachers, and other interested persons in the Open Roberta Lab. NEPO translates to New Easy Programming Online (or simply OPEN read backwards). NEPO is how we call our graphical programming language and its coupled hardware connection layer. NEPO uses the freely available Blockly library.[12] In addition within NEPO there are additional functionalities and improvements have been adapted for Open Roberta. The programming paradigm of NEPO is inspired by Scratch from Massachusetts Institute of Technology. A NEPO block always represents and encapsulates a certain robot functionality. A blocks feature set can easily be recognized through the associated block category, for example »sensors«. Programming with NEPO follows a simple principle. The blocks are interconnected and will be executed by the robot according to their order. This principle is called »sequential operation«.[13]

NEPO block categories

All available blocks are listed and categorized as the Action, Sensors, Control, Logic, Math, Text, Colours, Variables, Functions, and Massages as shown in the table below.

Category Notes    Category Notes
  Action Includes blocks for the robot to be performed directly.      Text Includes block to write strings on the robot display.
  Sensors Contains blocks for all standard sensors of the EV3 system.   Colours Standard colours block to compare sensor inputs.
  Control Includes blocks for the program sequence control. The category includes the following blocks: If .. do, If .. do .. else, repeat indefinitely, repeat .. times, wait .. ms, wait until ..   Variables Local and global variables can be defined.
  Logic With the »logic« blocks, conditions ca be created. With this condition you can interrelate states, values, and events with each other.   Functions Fucntions with input and output parameters can be defined.
  Math Mathematical operators and parameter blocks.   Messages Includes blocks to send and receive bluetooth massages.
  List Includes blocks to create a list and to search, sort list elements   program-start Each program starts with this block. This block is always available in the workspace.

NEPO input / output connector

NEPO typ check input connectors

Depending on the block different values can be passed to a block. The type of the value can be identified by the colored compounds (called including »connectors«) of a block. In the chapter »block category« you can see the different values a block may have. Only if the colors of the input and the output connector match, these blocks can be connected.

A block may optionally also pass a value (only one!) to another block. These blocks have colored output connectors. Only if the colors of the input and the output connector are the same, these blocks can be connected.

NEPO typ check output connectors

In total there are six input and output types within NEPO. These types can have the following values:

Simulation environment

Open Roberta 2D simulation of a wheeled robot

Since version beta 1.3.0 the Open Roberta Lab also offers a simulation environment. This is a simulation of a two-dimensional robot model equipped with two wheels (differential drive). To program the simulated robot also the programming language NEPO may be used. The simulated 2D model includes the simulation of an ultrasonic sensor, a touch sensor, a color sensor and the display of an LED. In addition, different environments can be chosen.

History

Open Roberta is a technological extension of the "Roberta concept". Roberta (short for: "Roberta - Learning with robots") is a Fraunhofer education initiative founded in 2002 by the Germany Ministry of Education and Research.[14]

Awards

Open Roberta won the award "Bundessieger 2015" at the challenge "Germany Land of Ideas" in the category education.[15]

References

  1. ↑ Journal Learning und Medien (LOM)
  2. ↑ Open Roberta Website
  3. ↑ Pressemitteilung von Fraunhofer IAIS.
  4. ↑ Google Produkt Blog
  5. ↑ Google.org
  6. ↑ LEGO Engineering Website
  7. ↑ Geek in Sydney
  8. ↑ „Open Roberta Lab“
  9. ↑ Jost, B., Ketterl, M., Budde, R., Leimbach, T. Graphical Programming Environments for Educational Robots: Open Roberta – Yet another One?, in IEEE International Symposium on Multimedia (ISM), December 2014
  10. ↑ The Next Web
  11. ↑ Open Roberta Developer Website
  12. ↑ Blockly Website
  13. ↑ „Dokumentation NEPO“
  14. ↑ Roberta Homepage
  15. ↑ Germany Land of Ideas

External links

This article is issued from Wikipedia - version of the Monday, February 01, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.