So after logging data for a few days, and having experienced a spike two days ago, we see the following:
(note I have not correctly implemented the breakpoint yet for the 50-100 level for the 2.5 AQI number, but the trend is there)
Compared with aqicn.org''s chart at the YVR location over the same period:
What I've noticed however is that there's quite a big difference between stations, at least when the entire city is not completely enveloped in visible smoke. Therefore, any discrepancy, especially when the values are generally low, could be quite localized.
The test google drive spreadsheet is getting a bit long... I'm contemplating either being lazy and just starting a new one (since by default it just tries to write to "Sheet1"), or maybe code up something more interesting...
The other thing of interest is that the aqicn hardware platform uses data tha comes from these Plantower PM5003/7003 sensors, which are in the similar price range of the SDS011 and have very similar performance characteristics. They also have a nice list of similar devices here. Is it time for another AliExpress order?
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