WS4D-uEXI available as Open Source

May 11th, 2012

We have finally made it to publish our Efficient XML Interchange (EXI) parser as Open Source. The implementation is called WS4D-uEXI. The ‘u’ stands for ‘micro’ and yes, this means it has really small footprint. uEXI is designed to run on WSN/6LoWPAN mote class devices with only tens of kB RAM and ROM. You will find some more information, documentation and of course also the code on the WS4D-uEXI project website at Google Code. Fell free to join the project and contribute!

Secure Smart-* Demo (@ CEBIT 2012 in Hannover)

February 23rd, 2012

We have assembled a brand new demo for our booth at the CEBIT 2012 in Hannover. The demo is based on our well-known Smart Window Demo, but now includes NFC technology to make the system more secure. The video below shows the different flavors we have integrated in the demonstrator. Feel free to join us at our CEBIT booth and watch the demo live!

WS4D @ IETF 83rd in Paris

February 20th, 2012

The 83rd IETF Meeting in Paris is approaching (March 25-30, 2012). Of course, WS4D will be there to contribute in the IoT activities of the IETF (6LoWPAN, CoAP and RPL). Feel free to contact us and meet us there!

We will be at all the three major IoT events in Paris:


uService at CeBIT 2012 – Easily create your own mobile app

February 7th, 2012

At CeBIT 2012 in Hannover, Germany, the ITEA 2 project ( is going to showcase the easy creation of mobile services. You will be able to have a hands-on with the uService editor, create your own mobile app and share it with other people. Everybody can do that!

The CeBIT is world’s largest and most international computer expo. Please feel free to visit the uService booth at Hall 9, Stand F34 from March 6th to 10th. We look forward to see you there!

The uService project has been funded by the German Federal Ministry of Education and Research under contract number 01—S0902F. German partners in this project are: Communology, DFKI (German Research Center for Artificial Intelligence), DLZ (Deutsches Lauftherapiezentrum), Orga Systems, Safran Morpho, University of Rostock.

Short project description

The uService project investigates the turn of mobile users into service super prosumers in order to benefit from the vast number of potential mobile services. These services can be consumed remotely by other users, in a simple way, with only their mobile devices. Mobile-to-mobile provision of this type of user-generated mobile services implies millions of potential sources with valuable information for the same amount of potential users.

Due to the particular challenge of the mobile environment, where device resources, interaction possibilities and user attention are much more restricted compared to the fixed, traditional Web environment, uService proposes a new way to look at mobile information services in order to solve this problem and deliver services that all users are expecting – above all the non-technical users. In the uService project, this type of service is called micro service or uService. These services are small, sharply focused applications with their own graphical user interface, which allow users to obtain and provide information – like opinions, recommendation, location or speed – to fellow mobile users.

[update] TeKoMed Workshop in Lübeck

October 25th, 2011

For the 3rd time, the TeKoMed-Workshop will be held in Lübeck. This year it will be a two days event from 7th to 8th of November 2012. Objective of the workshop is the usage of Service-oriented principles in the domain of medical devices, mainly focusing on device integration in medical institutions like for example hospitals.  Of course, everybody is invited to participate! Find more informations on the workshop website.

[update] For those interested in the slides of the presentations, you can download them on the workshop website of the TeKoMed Workshop. [/update]

WS4D @ IoTech Workshop

October 17th, 2011

On October 17th, the International Workshop on Internet of Things Technology and Architectures (IoTech) was held in Valencia/Spain, co-located with the IEEE MASS conference. The objectives of the workshop read like the who-is-who of several WS4D efforts: IPv6, 6LoWPAN, RPL, CoAP, EXI , IEEE 802.15.4, IoT, WSN etc. So also WS4D joined the IoTech and presented the SOAP-over-CoAP approach. But you might find other things among the presentations.

[Update] 6th IEEE SOCNE Workshop

April 29th, 2011

The 6th IEEE International Workshop on Service Oriented Architectures in Converging Networked Environments (SOCNE) has been be held in conjunction with 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA’2011) in Toulouse, France, 05.  September 2011.

The scope of the SOCNE workshop is on not only on SOAs in general, but also on (resource constrained) device centric environments, including H2M and M2M scenarios. And of course the REST folk is welcome as well :).

For more information visit the workshop website


The proceedings of the SOCNE workshop are now available on From those presenters who kindly sent us theire files, we also published the accoring slides to the papers.

The next ETFA 2012 will be held in Krakow/Poland. This is probably one of the most beautiful cities in Europe and thus maybe also the venue for SOCNE 2012?!?!?!


Announcing WS4D-JCoAP

April 14th, 2011

WS4D JCoAP WS4D-jCoAP is an implementation of the Constrained Application Protocol (CoAP) for Java. CoAP is an exciting emerging protocol defined by the IETF CoRE WG, which is a RFC – Proposed Standard. To put things short, CoAP is supposed to create an alternative to HTTP for RESTful APIs on highly resource-constrained devices. While HTTP usually bases on TCP, CoAP defines rudimentary reliability features so you can run it on UDP and therefore save a lot of protocol overhead that inherently comes with TCP.

Now that you have an idea of what CoAP is (if you hadn’t already) we want to share our latest efforts on implementing CoAP. Until now WS4D-jCoAP has grown to be a complete CoAP draft 18 implementation of the client and server side and it is still evolving.

If you are curious right now or want to support us, check out the gitlab repository. Have fun!

WS4D Smart-* Demonstrator

February 21st, 2011

As we already posted, the CEBIT in Hannover and the Embedded World on Nürnberg are getting closer. So we posted a preview on the CEBIT demonstrator a few days ago, showing WS4D-uDPWS in action (see the SpO2 finger clip sensor).

Now would like to give a preview on the Embedded World demonstrator here. The video shows our Smart-Window, opening and closing depending on the humidity. The involved technologies are 6LoWPAN, IPv6, CoAP, DPWS, Digitalstrom and several of our existing WS4D tools. Feel free to comment…


February 21st, 2011

In January, the Internet Architecture Board announced the ‘Interconnecting Smart Objects with the Internet Workshop‘ to be held in conjunction with the IETF80 in Prague. While the workshop requires a selection of participants, the additional held ‘Tutorial on Interconnecting Smart Objects with the Internet’ is open for everyone. WS4D will join both the workshop and the tutorial. So feel free to join the tutorial and meet the strange IETF folk in Prague!

Background: WS4D participates in the IETF mainly in the 6LoWPAN and CoRE working groups, published I-Ds about DPWS for 6LoWPAN and SOAP over CoAP and has developed WS4D-uDPWS, an Open Source DPWS stack for mote class devices.