How often does MB get UDP data from WLL? **solved**

[swyman18]

Hello,

I currently have a vantage pro2 console (circa 2014) and also a WeatherLink Live device that I have used for various scenarios over the years. I would like to decommission the vantage pro2 console and just have my weather programs all pull data from the WLL for simplicity.
During my testing I've noticed that MB seems to be getting wind readings from the WLL every 5-10 seconds instead of the normal 2-3 seconds when using the pro2 console. Sometimes I will see as much as 15 seconds pass between wind readings. This occasionally results in high wind gusts not being recognized.
I know that WLL is capable of supplying the wind readings every 2-3 seconds because if I use Weather Display and connect to the WLL, I see the UDP readings being updated every 2-3 seconds in the Davis WLL utility (crondaviswll).

So my question is, does MB "poll" for the WLL data at certain intervals or is it supposed to get data from the WLL's UDP port immediately when available.

Thank you for reading.

[admin]

Meteobridge needs to poll WLL as WLL does not send data anywhere on its own. It could technically do via broadcasts (as the weatherflow stations do), but Davis did not go this way. You inspect polling intervals on WLL sensors on "Monitoring - Live Data" tab, when I remember correctly it is 10 secs.

[swyman18]

Meteobridge needs to poll WLL as WLL does not send data anywhere on its own. It could technically do via broadcasts (as the weatherflow stations do), but Davis did not go this way. You inspect polling intervals on WLL sensors on "Monitoring - Live Data" tab, when I remember correctly it is 10 secs.

Thank you for confirming. Was hoping meteobridge would have the ability to poll the WLL more frequently, but I understand most may not have a need for that.
Have a good day, thanks!

[admin]

As WLL reports wind gust no wind peak is lost due to a relaxed poll interval.
Apart from wind speed super frequent polling is complete senseless and by requesting gust from station this issue is covered.
Seems like many users have an obsession to polling as hard as possible, but do not understand that they get no additional benefit by that.

[swyman18]

As WLL reports wind gust no wind peak is lost due to a relaxed poll interval.
Apart from wind speed super frequent polling is complete senseless and by requesting gust from station this issue is covered.
Seems like many users have an obsession to polling as hard as possible, but do not understand that they get no additional benefit by that.

Understood, thanks. However, when running MB with WLL for a few days I noticed that the daily Max wind speed being reported on the Min/Max Data tab was not the same as the daily max gust being reported on the WLL app (and on my pro2 console). I assumed it was because MB was missing some the "real-time" readings, but perhaps I'm doing something wrong. Apologies for the trouble and thanks again for taking the time to reply to my original inquiry.

[swyman18]

As WLL reports wind gust no wind peak is lost due to a relaxed poll interval.
Apart from wind speed super frequent polling is complete senseless and by requesting gust from station this issue is covered.
Seems like many users have an obsession to polling as hard as possible, but do not understand that they get no additional benefit by that.

Sorry to be a pest, just curious, you mention that WLL reports wind gust so what would be the correct template tag to obtain daily max gust? If I use [wind0wind-dmax] it is not accurate when comparing to maximum gust reported by the WLL app. It seems to be reporting just the highest reading received from the live sensor.

[Mattk]

What one won't get out of Davis is how they compute the true wind speed from the raw wind speed and if one was to receive the same ISS raw wind speed data from a single ISS to a range of Davis/Vue console versions over the years not even a Davis console will report the same identical/exact wind speed.

The real question here is, what is the actual value difference in this case and over what wind speed range? The expectation that a value has to be identical even across Davis's own hardware can be misunderstood.

[swyman18]

What one won't get out of Davis is how they compute the true wind speed from the raw wind speed and if one was to receive the same ISS raw wind speed data from a single ISS to a range of Davis/Vue console versions over the years not even a Davis console will report the same identical/exact wind speed.

The real question here is, what is the actual value difference in this case and over what wind speed range? The expectation that a value has to be identical even across Davis's own hardware can be misunderstood.

True… right now, I’m just looking at the WLL and I would expect the daily max wind gust my MB is getting from there would match what I see on the WLL app and on WeatherLink.com. Other programs I’ve used with WLL (weather display, cumulus) get the same daily max gust, but MB seems to sometimes miss the highest gust. If the WLL is indeed passing the highest gust to MB, I don’t know how to see it.

[Mattk]

So your configuration is ISS> WLL > MBPro and if so and not being familiar with the WLL how does the WLL& MBPro communicate?

Could the MBPro talk direct to the ISS?

[swyman18]

So your configuration is ISS> WLL > MBPro and if so and not being familiar with the WLL how does the WLL& MBPro communicate?

Could the MBPro talk direct to the ISS?

I’m not using a MBPro, I have a a D-link DIR-505 with MB image. So it’s ISS> WLL> DIR-505. MB communicates with the WLL via TPC/IP and from what I understand MB “polls” the WLL for the sensor data over the network.

[Mattk]

Ok gotcha ya.

Outstanding answer still remains? What is this difference of concern?

[swyman18]

Ok gotcha ya.

Outstanding answer still remains? What is this difference of concern?

Usually just a few mph or less, so obviously not the end of the world. I am in Hawaii, so the winds can vary wildly within seconds. So it’s easy for a high gust to get missed.

[admin]

Polling interval is not relevant for getting the max wind speed correctly.
The WLL reports "wind_speed_high_last_10_min" or "wind_gust_10_min" which meteobridge makes use of. You have these values in the "wind0wind-max" template variable reflected.