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Really Weird Rain Readings.

From build 3044 the development baton passed to Mark Crossley. Mark has been responsible for all the Builds since. He has made the code available on GitHub. It is Mark's hope that others will join in this development, but at the very least he welcomes your ideas for future developments (see Cumulus MX Development suggestions).

Moderator: mcrossley

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Phil23
Posts: 884
Joined: Sat 16 Jul 2016 11:59 pm
Weather Station: Davis VP2+ & GW1000 (Standalone)
Operating System: Win10 Pro / rPi Buster
Location: Australia

Really Weird Rain Readings.

Post by Phil23 »

Can't find an explanination for this, but during heavy rain on the 3rd & 4th, (which are still in my graphs),
Both my GW1000 sites were extremely under reading in both the gauges & charts.

Initially thought it to e a combination of Strong wind & the waver in the 6m pole the Ecowitt is mounted on.

At one point after rollover, EW Vs Davis was 0.8mm Vs 1.2mm, and I got watched the Davis climb to 4.6mm in a short time while the EW didn't budge.

So started blaming hardware, the tipper, the pole, network etc....

Later came to realise though that data fed to Ecowitt's site was correct.
Both uploads from the HP2551 & the GW1000 identical.....

I know at one point I compared all data & figured the EW had barely registered 20% of the Davis's Rain reading.

But now it all seems magically fixed.
And I'm at a total loss.

If you check the figures @ now though, Month to date,
Davis:- 40.8mm
Ecowitt:- 36.6mm

Close enough to be considered correct considering the EW's pole mount & much smaller rain collector.
If you look at the charts, they pretty much agree too, but neither did earlier in the piece.

Can't be exactly sure where I was with updates at that point, would need to go back on logs to check that.

Currently the 3 sites for compare are:-

w2.inverellit.com GW1000 on rPi
s7.inverellit.com Same GW1000 being read from a Win10 install
weather.inverellit.com VP2 on a Win10 Laptop.

Only other thing in the back of my mind is something related to "Last Tip" in the GW1000 world.
:Now: :Today/Yesterday:

Image

Main Station Davis VP2+ Running Via Win10 Pro.
Secondary Stations, Ecowitt HP2551/GW1000 Via rPi 3 & 4 Running Buster GUI.
:Local Inverell Ecowitt Station: :Remote Ashford Ecowitt Station:
User avatar
mcrossley
Posts: 12756
Joined: Thu 07 Jan 2010 9:44 pm
Weather Station: Davis VP2/WLL
Operating System: Bullseye Lite rPi
Location: Wilmslow, Cheshire, UK
Contact:

Re: Really Weird Rain Readings.

Post by mcrossley »

It was taking two rain tips in an update interval before the last rain date value was being set.
Afaik it wasn't affecting the rainfall totals, but I'd have to check out the old code to be sure.
Phil23
Posts: 884
Joined: Sat 16 Jul 2016 11:59 pm
Weather Station: Davis VP2+ & GW1000 (Standalone)
Operating System: Win10 Pro / rPi Buster
Location: Australia

Re: Really Weird Rain Readings.

Post by Phil23 »

I was at the point of dismissing it as poor station performance at first (with disappoinment).

Started, stopped & check both MX's with no difference.
Noted that Temp & Wind gauges both locally & Web based were fine.

But seeing the EW uploads then dismissed that.

No way could I force a correction, it just happened at a point in time.

A quick browse of the diags over that period shows that RainStart & RainCounter look completely correct.
:Now: :Today/Yesterday:

Image

Main Station Davis VP2+ Running Via Win10 Pro.
Secondary Stations, Ecowitt HP2551/GW1000 Via rPi 3 & 4 Running Buster GUI.
:Local Inverell Ecowitt Station: :Remote Ashford Ecowitt Station:
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