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Written by Jiří Eischmann on 2025-01-15 at 22:18

The #AirGradient air quality monitor arrived sooner than expected. It was really easy to assemble and connect to #HomeAssistant and it's already monitoring the air quality outside our house.

[#]AirQuality #AirPollution

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Descendants

Written by Old Man in the Shoe on 2025-01-15 at 22:19

@sesivany I want one

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Written by Old Man in the Shoe on 2025-01-15 at 22:22

@sesivany ...not for that price on the indoor monitor, yikes

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Written by Jiří Eischmann on 2025-01-15 at 22:30

@jenzi it isn't an indoor monitor. Yes, it's not cheap, but it is still considerably cheaper than other outdoor monitors with the same sensors.

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Written by Àlex Fiestas on 2025-01-15 at 22:21

@sesivany are you sending the data to airgradient as well or just to Ha?

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Written by Jiří Eischmann on 2025-01-15 at 22:31

@afiestas I do. There was not a single AirGradient monitor in Brno, so I gladly filled the blank part of the map.

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Written by Kevin P. Fleming on 2025-01-15 at 22:37

@sesivany Pay close attention to the correction algorithms posted on their forum... the outdoor unit in particular has an issue with heat generated by the processor.

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Written by Jiří Eischmann on 2025-01-15 at 22:42

@kevin does it also affect the air quality data or only the temperature and relative humidity? Because I'm not going to use it to monitor these, I've got a weather station for that.

I've already noticed that the temperature measured by this is 1-1.5C higher than what the weather station measures.

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Written by Kevin P. Fleming on 2025-01-15 at 22:48

@sesivany Just temperature and humidity.

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Written by Jiří Eischmann on 2025-01-16 at 07:24

@kevin I see they also have a correction formula for PM2.5 and a pretty complex one. Another rabbit hole I got myself into. 🙈

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Written by Kevin P. Fleming on 2025-01-16 at 11:20

@sesivany Yeah... I've got three indoor and one outdoor unit, and while there's a lot to like about them they also have repeatability issues. Of course, I'm not using them for scientific purposes 🙂

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Written by Jiří Eischmann on 2025-01-16 at 12:50

@kevin BTW I learned that the Home Assistant integration already applies the correction formulas. So no need to do anything about it.

The temperature is still 1.5C higher, but it may be due to a different location. The weather station is on the fence on the other side of the garden while the air quality monitor is in its temporary location on the porch.

I also don't need scientific accuracy. Several neighbors burn wood to heat up their houses and the air tends to be quite bad in winter, so I just want to know how bad it is.

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Written by Paul Martin on 2025-01-15 at 22:49

@kevin@km6g.us @sesivany@vivaldi.net That quirk could be used to measure the effects of wind chill.

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Written by Thomas on 2025-01-16 at 04:37

@sesivany

Does it work with https://sensor.community/cz/ ?

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Written by Jiří Eischmann on 2025-01-16 at 08:36

@tpheine no idea, but probably not out of the box. The device is open source, all data available, so it's doable, but probably some service in the middle would be needed.

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Written by Thomas on 2025-01-16 at 09:01

@sesivany

Thank you. So I will stick with my compatible sensors to make my data publicly available for the sensor community 😊

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Written by Jiří Eischmann on 2025-01-16 at 15:34

@tpheine I looked at it and it seems to be possible: https://forum.sensor.community/t/hope-to-add-airgradient-device-data-to-sensor-community-map/2901

The AirGradient founder even suggested the sensor community pull the data from all their stations since it's publicly available, too.

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