Topic: Davis Airlink Professional Air Quality Sensor PM 1, 2.5 & 10

[Matt.j5b]

What about a cable like this?
https://www.amazon.com/dp/B009GUMXQE/ref=cm_sw_r_u_apa_fabc_4SS1FbDW4S978

For a 40 ft run would voltage drop become a concern ?

I ended up using a USB extension cable similar to that one. It seems to work fine with the Airlink. I didn't check whether I get any voltage drop but I am using a 3 m extension lead which keeps the total USB cable length to not exceed the 5m limit in the USB2 official spec. My has AWG24 cable rather than thinner cables of some the USB cables on the market, so that probably helped with minimizing the voltage drop.

[parkernathan]

I have a few test AirLinks (two indoors and one outdoors) since I work for AEM (now that Davis and Earth Networks are owned by AEM).

Here's my outdoor sensor:
https://www.weatherlink.com/embeddablePage/show/b8240747890046e7b4df5d65e371aa36/summary

[fkapp]

Do you guys recommend using the screen when installing outside?
Have you found any accuracy impact from the screen?

Moving my air link outside tomorrow now that I have power run to the location so trying to decide screen or no screen.

Thanks
  Frank

[parkernathan]

I used the screen outside on my porch since a lot of rain blows up there, and I didn't want any issues. I haven't been able to tell if it impacts accuracy.

[oregonalex]

Does anyone know the update interval of the AirLink data in the Weatherlink.com bulletin (standalone AirLink)?

I have the Pro subscription and the 'Last updated' timestamp changes every minute, but it is hard to tell if the data values actually change that often. The historical records are stored in 15 min intervals.

Considering downgrading to a Basic subscription, but would like to know if the upload interval is the same.  There is a parameter in the description of the various subscription tiers called '3rd Party Intervals', which is 15 min and 5 min respectively for the Basic and Pro tiers.  I don't think it applies to the Weatherlink site though, only to uploads to 3rd party sites.

Also, does anyone know how much data can Airlink buffer if it loses WiFi connection?  I noticed it remembers data and sends it up once WiFi is restored.

Thanks!

[Mapantz]

Does anyone know the update interval of the AirLink data in the Weatherlink.com bulletin (standalone AirLink)?

I have the Pro subscription and the 'Last updated' timestamp changes every minute, but it is hard to tell if the data values actually change that often. The historical records are stored in 15 min intervals.

Considering downgrading to a Basic subscription, but would like to know if the upload interval is the same.  There is a parameter in the description of the various subscription tiers called '3rd Party Intervals', which is 15 min and 5 min respectively for the Basic and Pro tiers.  I don't think it applies to the Weatherlink site though, only to uploads to 3rd party sites.

Also, does anyone know how much data can Airlink buffer if it loses WiFi connection?  I noticed it remembers data and sends it up once WiFi is restored.

Thanks!

Airlink updates at 1 minute intervals. I grab the data via Cumulus MX, and show the values on my website. They update every 1 minute regardless of a subscription, because the Airlink is a standalone device.

I use a Weatherlink Live, and I'm pretty sure data is sent every 1 minute even without a subscription. You'll only see updates at 15 minute intervals, though.

As for the buffer size - not sure. I was offline for around 3 to 4 hours when my fibre internet was installed, and it sent all of that missing data through to Weatherlink once I was back online.

[parkernathan]

Using Cumulus MX you might be able to get the data at 1 min intervals, but the WeatherLink app has handcuffed all three of my AirLinks to 15 min intervals since I don’t have Plus. Trying to see if I can get a free copy of Plus since I work for AEM, but if not, I may just spring for it myself since I need to try Mobilize.

[Mapantz]

Using Cumulus MX you might be able to get the data at 1 min intervals, but the WeatherLink app has handcuffed all three of my AirLinks to 15 min intervals since I don’t have Plus. Trying to see if I can get a free copy of Plus since I work for AEM, but if not, I may just spring for it myself since I need to try Mobilize.

I'm pretty sure that Airlink data in the Weatherlink app updates every one minute, even without a pro subscription.. Perhaps you mean the archive interval?

http://your.airlink.internal.ip.address/v1/current_conditions

If you refresh the page after a minute or so, you'll see new values.

[oregonalex]

Using Cumulus MX you might be able to get the data at 1 min intervals, but the WeatherLink app has handcuffed all three of my AirLinks to 15 min intervals since I don’t have Plus. Trying to see if I can get a free copy of Plus since I work for AEM, but if not, I may just spring for it myself since I need to try Mobilize.

I'm pretty sure that Airlink data in the Weatherlink app updates every one minute, even without a pro subscription.. Perhaps you mean the archive interval?

http://your.airlink.internal.ip.address/v1/current_conditions

If you refresh the page after a minute or so, you'll see new values.

Yeah. There are four separate time intervals involved with AirLink and WeatherLink.com:

1. Interval at which AirLink sends data to Weatherlink.com servers.  This is 1 minute as stated in the specs and confirmed by experiments.

2. Interval at which the bulletin page on Weatherlink.com displays fresh data from Airlink.  According to @Mapantz 's post above, this also is 1 minute, regardless of the subscription tier.  This was my original question.

3. Historical data storage and charting interval. This is obviously 15 minutes regardless of tier.

4. Retransmit interval by weatherlink.com to 3rd party sites. This is tier dependent - 15 minutes for Basic, 5 minutes for Pro and up to 1 minute for higher tiers.

[parkernathan]

I just re-checked and it is archive rate. Seems you can bump it up with Pro, but otherwise it does send data to the dashboard every minute. Good to know!

[Mchd17]

3. Historical data storage and charting interval. This is obviously 15 minutes regardless of tier.

I have Pro+ and can set AirLink archive rate to, 1 min, 5 min, 15 min, 30 min, 60 min

[oregonalex]

3. Historical data storage and charting interval. This is obviously 15 minutes regardless of tier.

I have Pro+ and can set AirLink archive rate to, 1 min, 5 min, 15 min, 30 min, 60 min

I stand corrected.  According to the WeatherLink app, I can bump it to 5min with Pro, but it requires Pro+ for 1min. 15min and longer for Basic.

Apparently, you have to use the App to change the archive interval, I have not found any setting for it on weatherlink.com.

[oregonalex]

I have also found an answer to my question about the buffer size in the AirLink. Onboard data storage depends on the Archive interval:

1min - 21 hours
5 min - 84 hours
15 min - 100 hours
30 minute - 130 hours
60 minutes - 268 hours
120 minutes - WeatherLink crashes,  apparently an invalid archive interval option

[Mchd17]

Apparently, you have to use the App to change the archive interval, I have not found any setting for it on weatherlink.com.

Weatherlink.com- under Device Settings for your Airlink is the Archive Rate.

[oregonalex]

Apparently, you have to use the App to change the archive interval, I have not found any setting for it on weatherlink.com.

Weatherlink.com- under Device Settings for your Airlink is the Archive Rate.

Ha! Found it! Not the easiest web site to navigate. Thanks!

[parkernathan]

Yeah, WeatherLink.com is a little clunky to navigate. If anyone has any feedback on it, let me know, and I can pass it on to their teams. What they do with it we’ll see, but at least I can try!