UK DAQI aqi.sdb

[steepleian]

UK DAQI aqi.sdb

[jonathankoren]

My initial thoughts is that this is a configuration error. The UK and US AQI calculations use the same code, so I doubt that it's something code related.

It's impossible for me to tell what the proper value should be, since this doesn't contain the readings from the sds011. I will say that that UK DAQI is defines PM 2.5 and PM 10.0 in microgram_per_meter_cubed , which does seem to be the output of weewx-sds011 https://github.com/matthewwall/weewx-sds011/blob/master/bin/user/sds011.py#L211 . However, it doesn't look like it's setting the units on the column.

Is there anything in logs that looks strange?

I've filed an issue against weewx-sds011, but I'll add a fix on my side that will assume that units are as expected if they are not set.

You can try the moar-logging branch, as that ha the additional logging and fallback about missing sensor units.

[steepleian]

I can confirm that the SDS011 uses microgram_per_meter_cubed.
Regarding Python version, I am using 3
Thank you

[jonathankoren]

I submitted a patch to weewx-sds011 to set units on the measurements. matthewwall/weewx-sds011#3

Additionally, I added two fixes on the weewx-aqi side via #10 . First, weewx-aqi now assumes that the measurement units are in whatever units they need to be for the configured AQI standard. However, it spams the logs with a warning if the units are missing. I'd recommend patching your local sds011.py with my changes. (They're a trivial paste at the top of the file. See the PR linked above.) Second, weewx-aqi wasn't correctly merging temperature and pressure information from the main weather db when the air quality sensor doesn't have it. That now happens.

Once I made both of these changes, I confirmed I was able to calculate UK's DAQI for PM 2.5 using data from a sensor schema that matched weewx-sds011 .

I've merged these changes into master, and have created a new release v1.3 .

I think this is fixed now. Reopen / comment if you're still having issues.

[jonathankoren]

As far as the composite is null and the PM 2.5 & 10.0 being all at index 1 and category 0, that's hard to determine. the DAQI is only has integers on [1, 10] and currently all of the Britain is forecasted to be at DAQI 1 for the next few days. When recalculating DAQI using my data, I saw a range of values over the course of a couple of years, which makes sense due to the smoke from the Northern California forest fires a couple of years ago. I believe it's calculating the DAQI correctly.