Re: [weewx-user] Purple Air and WeeWx-Purple extension

Thanks John, I am still wrapping my head around this AQI calculation, and will check it as you describe. For the moment, I am satisfied to know that Whew-Purple is likely to be accurate. > On 11 Jan, 2025, at 17:33, 'John Kline' via weewx-user > mailto:weewx-user@googlegroups.com>> wrote: > >

Re: [weewx-user] Purple Air and WeeWx-Purple extension

Hi Dan,Please explain how weewx.conf entries could fix the AQI displayed on the PurpleAir website?The AQI you are seeing from my purple extension has the correct pm2_5_cf_1 EPA correction (computed from the average of the two pm2_5_cf_1 readings of the two sensors as well as the current_humidity re

Re: [weewx-user] Purple Air and WeeWx-Purple extension

Thanks John, did the map settings, and will experiment with your links. I guess there isn't a way to do that correction in the weewx.conf file then? > On 10 Jan, 2025, at 13:02, 'John Kline' via weewx-user > mailto:weewx-user@googlegroups.com>> wrote: > > The following settings in the purpleair

Re: [weewx-user] Purple Air and WeeWx-Purple extension

I thought it might be something along those lines. How would I tell is the PA unit is using the new correction? My unit appears here on the PA map, and the page displaying yo

Re: [weewx-user] Purple Air and WeeWx-Purple extension

There are two reasons these can differ.  One, the PurpleAir map you are showing is a 2m average while the weewx-purple loop packets are the most recent reading.  Also, the EPA has updated the AQI calculation (see: https://www.epa.gov/system/files/documents/2024-02/pm-naaqs-air-quality-index-fact-sh