There are two versions of the Meet je Stad station.
Version 1 measures climate: Temperature and Relative Humidity. You can participate in MjS climate by building a sensor station in a workshop, and coming to a meeting on the 21st of the month. Check the website to see if there is a Meet je Stad near you!
Version 2 is still under development, and measures temperature, RH, air quality and soil moisture. You can participate by helping us work on the firmware, hardware or designing a workshop for v2.