Webpage with pictures

Noxens is a contribution to the work of Manfred Kraft (Scholz und Volkmer agency) on recording and visualizing the environmental impact of nitrogen oxides, which are mainly produced by diesel combustion engines.

In the spirit of citizen science, a small portable sensor device was developed that can be connected to a corresponding app via Bluetooth LE. The app receives the sensor measurement data and sends it paired with the location to a backend. On the backend side, the data is fed into a database and then displayed graphically on a map. Different colors represent different levels of pollution. In this way, everyone can contribute to highlighting hotspots of environmental pollution.

For Noxens, I designed and developed a smaller electronic device based on Manfred Kraft’s prototype. The device can be operated with a button cell. I also developed the firmware based on mbed and the app, which I created using the Ionic Framework. The challenges were the power management for the longest possible operation, the handling of the analog gas sensor and the background operation of the app.