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Attention.png You are visiting an old member project. The information found on "Airrohr" might be out of date. Airrohr has not been put back up after the move yet.

Release status: obsolete [box doku]

Description Building an Airrohr and participating in
Author(s)  Severin, Matthias

The OK Lab Stuttgart has developed a kit to measure air pollution, especially particulate. It is easy to build, provides the necessary firmware and gathers the data on a geographical map for everyone to follow.

More information on

We built one for the lab and put it in front of our building. A second one is mounted inside above the 3D printing shelves.



  • SDS011 to measure the particulate
  • DHT22 for the temperature


It needs more or less:

  • a NodeMCU (ESP8266) so that their firmware is running out of the box (support automatic update of the firmware).
  • some pipes from the Baumarkt and
  • a USB / Power-Plug

Instructions to assemble can be found here:

Code for the Firmware can be found here:


Outside Sensor

Inside Sensor


You can also get the latest measurements of the sensors from our IRC/Flowdock bot with the command !feinstaub