Innovative eHealth device for air quality using FIWARE

Challenge & Context

WOBCOM’s service facilitates proper ventilation by automatically measuring CO2 levels via sensors in everyday situations. Catholic daycare centers in Wolfsburg (Lower Saxony, Germany) have already opted for


In the case of the CO2 measurement use case, the solution builds on WOBCOM’s ODP ecosystem. With the ODP, WOBCOM has built a tailor-made ecosystem to be able to map as many individual use cases as required for the innovation-driven Smart City of Wolfsburg. The heart of this ODP is represented by FIWARE technology , which significantly enables and powers up the respective applications.

This includes the conditions for measuring critical data in real-time, depending on the individual use case, respecting General Data Protection Regulations (GDPR), and ultimately the analysis of the measured data. This is achieved through specially created dashboards, which are individually created depending on the specific use cases and customer requirements. The dashboards display the corresponding data and information on different technical devices, such as tablets, smartphones or conventional browsers.

In addition, data and information can be communicated to other linked devices via the open digital platform and further dashboards. For example, an LED cube can communicate with a measurement sensor and the WOBCOM platform to then display specific values in real-time throughout the premises where the sensor is measuring data.

The Catholic daycare centers in Wolfsburg, for example, are taking advantage of this system to ensure correct ventilation in an easy and comfortable way, to follow Covid-19 recommendations as well as following regular ventilation measures outside of pandemic times.

Although measurements can happen in any room of interest, the installed measuring devices in the daycare centers, in this case, measure CO2 values in the play and recreation rooms. These communicate with each other via the WOBCOM platform using one or more LED Cubes. An LED Cube is a device that uses light indicators to visually display changes in the measurements which in turn helps the decision to immediately initiate appropriate measures. The data is sent to the foreseen LED Cube that is linked via LoRaWAN, which, in this case, continuously displays the CO2 levels in the premises. An enormous benefit of working with such cubes is that they work like intuitive traffic lights: If the cube lights up green, the CO2 value is OK, but if it lights up yellow, it should be aired soon. If it lights up red, the appropriate CO2 value has been significantly exceeded and ventilation should be carried out immediately.
In addition to the information on CO2 levels, a dashboard can also be used to display other values such as temperature, humidity or movement over specific periods of time. The advantage of this is that heating costs, for example, can additionally be reduced in the long term.

Figure 1 . sensors, dashboard and LED cube - complete equipment for fully automated air measurement.

All data are of course handled in compliance with data protection laws. is a modular system whose components (sensors, radio network and linked devices) are built on top of each other and use the FIWARE Context Broker as a central implementation element. The FIWARE Context Broker Generic Enabler is the core of such a solution and a mandatory component of any “Powered by FIWARE” solution or platform. It enables the management of context information in a highly decentralized and large-scale manner. is a flexible system that can be installed according to individual customer requirements providing added value to a wide variety of companies and organizations in literally any industry looking to optimize its processes.

How it works

Figure 2 . Dashboard and Maps

Benefits & Impact

Added Value through FIWARE

FIWARE technologies are the key enabler of the and WOBApp solution due to the fact that FIWARE Internet of Things Agent for LoRaWAN protocol enables data and commands to be exchanged between IoT devices and FIWARE NGSI Context Brokers using LoRaWAN protocol. It is based on the FIWARE IoT Agent Node.js Library.

The proposed Network Architecture for a LoRaWAN based system relies on a mesh network architecture composed of End nodes, Concentrators, Network Servers and Application Servers. One major added-value to be noted is that this IoTA is fully compliant with the used architecture, providing interoperability between FIWARE NGSI Context Broker and LoRaWAN devices.

Figure 3 . Architecture Open Digital Platform with FIWARE IoT Agent is one of many in-house projects, that, thanks to the FIWARE ASTRID iHUB (, showcases additionally the success of a wider ecosystem, and thus, the rise of new connecting communities of incubators, accelerators, and mentoring activities. Such initiatives and projects are becoming the beating heart of innovation in the city of Wolfsburg. With stakes so high to compete in a national technology industry ecosystem, constant contact with the Open Source community through the FIWARE Accelerator Program has proven to be vital.

Next steps

In this period of strong digital transformation, the German government has created a strategic “Digital Agenda”, and, together with Gaia-X, is pushing the country’s innovation potential to ensure growth and employment, supporting the development of a nationwide high-speed network, and improving IT security to generate trust within the society. WOBCOM is part of this great initiative.

“We believe in cooperation and Open Source. Now more than ever, companies across a broad array of industries are being impacted by the rapid pace of change in digital arenas. European and cross-industry collaborations and partnerships are key to staying ahead, as is learning how to embrace change in a nimble way to avoid the status quo for fear of failure or uncertainty.”

Dalibor Dreznjak
CSO Stadtwerke Wolfsburg AG


Authors & Contributors

Giovanni Coppa
Head of Data Center and Cloud Innovation
Contact @

Lisa Hillmann
Marketing Manager
Contact @




Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store

FIWARE is the Open Source Platform for Our Smart Digital Future.