Hi Lately I have discovered some sensor board failures on our #viadukaduk sensor group.
All 3 boards concerned, lost the VOC / CO2 sensors, one of them also the temp, humidity sensor, one has microphone issues - showing above 100dBA most of the time, but not all of the time - mostly int he night.
It seems the VOC, CO2 sensor is the most sensitive, vulnerable, at least in our area, climate and dust condition.
All of these sensors have been saved by reinstalling firmware from scratch and selectively enabling working sensors. However part of the functionality is gone.