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AirLink Spike

Discussion specific to Davis weather stations
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Mapantz
Posts: 1772
Joined: Sat 17 Dec 2011 11:55 am
Weather Station: Davis Vantage Pro2
Operating System: Windows 11 x64
Location: Dorset - UK
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AirLink Spike

Post by Mapantz »

Just had a short power cut here, and once again, observed the AirLink data spiking when it comes back on.

https://ibb.co/SrmvpDT
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mcrossley
Posts: 12569
Joined: Thu 07 Jan 2010 9:44 pm
Weather Station: Davis VP2/WLL
Operating System: Bullseye Lite rPi
Location: Wilmslow, Cheshire, UK
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Re: AirLink Spike

Post by mcrossley »

Odd, but I've just had a spike too...
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Screenshot 2023-10-27 183635.png
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Somebody down the road has fired up their "green" (not) wood burner.
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Mapantz
Posts: 1772
Joined: Sat 17 Dec 2011 11:55 am
Weather Station: Davis Vantage Pro2
Operating System: Windows 11 x64
Location: Dorset - UK
Contact:

Re: AirLink Spike

Post by Mapantz »

Look at the AQI line on my graph.. it shouldn't go up like that.
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mcrossley
Posts: 12569
Joined: Thu 07 Jan 2010 9:44 pm
Weather Station: Davis VP2/WLL
Operating System: Bullseye Lite rPi
Location: Wilmslow, Cheshire, UK
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Re: AirLink Spike

Post by mcrossley »

That is where you need to look at confidence figures. At startup it has little data to calculate from, and the corresponding confidence percentage will be very low.
Mapantz
Posts: 1772
Joined: Sat 17 Dec 2011 11:55 am
Weather Station: Davis Vantage Pro2
Operating System: Windows 11 x64
Location: Dorset - UK
Contact:

Re: AirLink Spike

Post by Mapantz »

It still doesn't explain why the instantaneous values jump so high after the AirLink has restarted. It does it every time when there's a power cycle.
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mcrossley
Posts: 12569
Joined: Thu 07 Jan 2010 9:44 pm
Weather Station: Davis VP2/WLL
Operating System: Bullseye Lite rPi
Location: Wilmslow, Cheshire, UK
Contact:

Re: AirLink Spike

Post by mcrossley »

True. No idea, I only power mine off once a year to give it a clean - I'll look at it next time.
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