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Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4019) - 03 April 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Comparison of WS80 wind speeds against Davis VP2
- 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: Comparison of WS80 wind speeds against Davis VP2
Ah! You are probably right, that will have 2.5 second updates as that is determined by the SIM, just a shame it is sooo expensive when compared to the Ecowitt units. Maybe Ecowitt should make a Davis compatible version!
- HansR
- Posts: 5958
- Joined: Sat 20 Oct 2012 6:53 am
- Weather Station: GW1100 (WS80/WH40)
- Operating System: Raspberry OS/Bookworm
- Location: Wagenborgen (NL)
- Contact:
Re: Comparison of WS80 wind speeds against Davis VP2
Second that. My Davis solar sensor broke and it would cost me € 200 to replace. I bought a whole Ecowitt ecology for less than that and added some extra sensors. I can buy a lot of batteries and have a lot of thoughts about Ecowitt improvements for that economic difference. If Davis wants to survive, they must become more economic. Their advantages are not that big. Yes Ecowitt sometimes annoys but really what is the weight of annoyance?
And having said that: many thanks for the effort of making the Ecowitt supported by CMX.
Hans
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
https://meteo-wagenborgen.nl
CMX build 4017+ ● RPi 3B+ ● Raspbian Linux 6.1.21-v7+ armv7l ● dotnet 8.0.3
- 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: Comparison of WS80 wind speeds against Davis VP2
... despite their best efforts to make it much harder than it should be!
The direction deviated a bit yesterday after I posted that graph above...
. .
I did have a thought about the lower gust speeds for the WS80. The spec says that it only samples for 1 second out of the 4.8 seconds interval when the wind speed is above 11 mph (5 m/s). I wonder if it is just missing them? There again the Davis gust is the average over 2.5 seconds. I don't really understand why they only sample for 1 second above 5 m/s, below 3 m/s (6 mph) they sample for 4 seconds. Seems weird to me, especially as gusts are normally a 3 second average.
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- 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: Comparison of WS80 wind speeds against Davis VP2
Looking at the first gust graph and this one to a lesser extent, the WS80 gusts seem to match or exceed the VP below that 6 mph threshold. Above that they only very occasionally match or exceed.
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