I have had the sen0321 ozone sensor for 5 days. It clips the output from below at 20ppb, meaning that all readings that should have been below 20 are published as 20. From a graph showing quite a lot of fluctuation, it is clear that when it gets down to 20 it is just constant, with no fluctuation at all. (The graph really looks like clipped audio up-side down.) Clearly an analog signal cannot look like this, so the physical part of the sensor cannot be blamed.)
(Sorry if this is rather a hardware problem, but I cannot make that conclusion without first hearing what the developers say about the software.)
I have had the sen0321 ozone sensor for 5 days. It clips the output from below at 20ppb, meaning that all readings that should have been below 20 are published as 20. From a graph showing quite a lot of fluctuation, it is clear that when it gets down to 20 it is just constant, with no fluctuation at all. (The graph really looks like clipped audio up-side down.) Clearly an analog signal cannot look like this, so the physical part of the sensor cannot be blamed.)
(Sorry if this is rather a hardware problem, but I cannot make that conclusion without first hearing what the developers say about the software.)