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Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4018) - 28 March 2024
Legacy Cumulus 1 release v1.9.4 (build 1099) - 28 November 2014 (a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4018) - 28 March 2024
Legacy Cumulus 1 release v1.9.4 (build 1099) - 28 November 2014 (a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Sensor PM 2.5 & PM 10 - Purpleair Network www.purpleair.com
Moderator: mcrossley
- HansR
- Posts: 5871
- Joined: Sat 20 Oct 2012 6:53 am
- Weather Station: GW1100 (WS80/WH40)
- Operating System: Raspberry OS/Bullseye
- Location: Wagenborgen (NL)
- Contact:
Re: Sensor PM 2.5 & PM 10 - Purpleair Network www.purpleair.com
Hans
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
- beteljuice
- Posts: 3292
- Joined: Tue 09 Dec 2008 1:37 pm
- Weather Station: None !
- Operating System: W10 - Threadripper 16core, etc
- Location: Dudley, West Midlands, UK
Re: Sensor PM 2.5 & PM 10 - Purpleair Network www.purpleair.com
......................Imagine, what you will KNOW tomorrow !
- HansR
- Posts: 5871
- Joined: Sat 20 Oct 2012 6:53 am
- Weather Station: GW1100 (WS80/WH40)
- Operating System: Raspberry OS/Bullseye
- Location: Wagenborgen (NL)
- Contact:
Re: Sensor PM 2.5 & PM 10 - Purpleair Network www.purpleair.com
Ah, that's what you get when using the word hitchhiking I Guessbeteljuice wrote: ↑Sun 18 Oct 2020 12:27 am Hans .....
The answer's 42, you must understand the question first
But indeed, I assumed you ment something else... Assume
So, yes I guess everywhere most people like ready cooked meals.
But there are always some who try the real work. Search different routes, other answers. Truth.
Ah well it's a large galaxy.
Hans
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
- HansR
- Posts: 5871
- Joined: Sat 20 Oct 2012 6:53 am
- Weather Station: GW1100 (WS80/WH40)
- Operating System: Raspberry OS/Bullseye
- Location: Wagenborgen (NL)
- Contact:
Re: Sensor PM 2.5 & PM 10 - Purpleair Network www.purpleair.com
For those interested in this American 'correction' of actual measurements into 'corrected' (read reduced) values of particle matters sensor output.
Some additional articles (I may update this post if I find more interesting things)
Of course, everybody, any country, has the right to demand any data manipulation it wants. No problem with that. The point is, should USA EPA corrections be published alongside EU or UK rules? What would the effect be if nowcast and its (per device!) corrections become the new 'normal' while not a UK, EU or AUS demand.
Btw: the correction is applied by PurpleAir on their website, so not in the devices (the default being no correction). That is important as well if you want to emulate the PA device
Some additional articles (I may update this post if I find more interesting things)
- An updated version (dated April 21, 2020) of the article that really got me going (posted above by ConligWX). Final publication targeted for summer 2020 but did not find it. The original poster article is undated. The two correction equations differ a lot.
- An article on deeper understanding of the effect of the corrections (reduction of the nowcast values)
- Note that the correction discussed is only for the PurpleAir device because that one has two sensors read alternately on a ten second frequency (so each is reach once every 20 seconds). The average of the two is in the equation with a procedure how to handle differences.
- Some EPA (from the USA that is) info on indoor air quality. Really, breathing/living is a dangerous activity is my impression.
- LRAPA sponsoring the PurpleAir sensors (and corrections)
Of course, everybody, any country, has the right to demand any data manipulation it wants. No problem with that. The point is, should USA EPA corrections be published alongside EU or UK rules? What would the effect be if nowcast and its (per device!) corrections become the new 'normal' while not a UK, EU or AUS demand.
Btw: the correction is applied by PurpleAir on their website, so not in the devices (the default being no correction). That is important as well if you want to emulate the PA device
Hans
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
-
- Posts: 29
- Joined: Fri 17 Aug 2018 8:11 pm
- Weather Station: Davis VP2 Plus
- Operating System: Raspbian on Raspberry
- Location: Gaggiano - MI - ITA
- Contact:
Re: Sensor PM 2.5 & PM 10 - Purpleair Network www.purpleair.com
Thank you!
I see that it is working.
I can provide my sample file.
http://www.fracassi.net/public/json_31569.txt
this link was copied from the purpleair website.
or, the sensor is in the same LAN, you can access it directly.
Unfortunately I am very impractical!
I see that it is working.
I can provide my sample file.
http://www.fracassi.net/public/json_31569.txt
this link was copied from the purpleair website.
or, the sensor is in the same LAN, you can access it directly.
Unfortunately I am very impractical!