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2
You'd probably be better off asking on the weewx-users forum on Google groups.

AFAIK, KTA-282 doesn't pass through any Davis protocol so you would need a weewx driver that polls the Modbus registers. It shouldn't be too difficult to do but TBH I kind of doubt that anyone has ever done this - it's such a niche application. But someone on the weewx-users or weewx-developers groups is more likely to know for sure.
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Good morning ,

I have a Vantage Pro 2 weather station with the Envoy logger and through the serial connection a KTA-282 Modbus module from Ocean Controls.

Now I would like to access from Weewx on raspberry the Davis, but the Vantage driver have not the right access parameters to do that : there is someone that already have solved this problem ? Or someone the knows the driver could suggest the modification to do ?

The modbus module answer as a client on an local ip address and the port 502 with the mode3 ( read registers from location 40000+1).

Thanks

Guido
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Hi Stefan,

Thanks for all the helpful information! Can this sensor be used to measure water depth in a shallow marina (less than 4 feet deep)?
Of course, it's not only for snow, but also for all liquids.
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It doesn't have evaporation problem, radar wave detect rain drops when they are falling down in the air.
HY-RS2E radar rain gauge cost 430 USD/UNIT/FOB CHINA, and I may be able to apply extra discount for who would like to take first "bite".

The published specifications claim an accuracy of +/- 10%.  Does wind decrease the accuracy, or is that 10% error the worst case during a typhoon?

One more question.  Are english-language technical manuals available online to read prior to purchase?  I would like to know how complex it will be to write a device driver for weewx or other weather collection software before placing an order.....
I think what you're meanning is communication protocol?
Our sensor use international standard MODBUR-RTU protocol.
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WeatherUnderground / Re: WU - Let us know your issues
« Last post by Clumpton on Today at 02:58:29 AM »
Hi,
This is an old issue that has never been fixed despite repeated emails to WU and a previous post here.
On the Web forecast page there is a section called "Today's Extremes" - if you look at this data for anywhere in Europe (and maybe anywhere outside the US) you always get the data for the same day: 2017/01/25 (you see this date in the links to the reporting stations).


Apparently it is -8°C in Rodez, a 100 km from me, where it is midsummer and currently 17°C!
The links show for example http://www.wunderground.com/history/airport/LFCR/2017/01/25/DailyHistory.html

Hopefully we can finally get this fixed please?
TIA
7
Thinking further about it... on a day with almost no wind heat can easily stagnate in one area. Tons of microclimates develop. The additional plant life in town could moderate and absorb some of the heat in places. Not sure you can read too much into the airport temp on such a day.
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That's still 2° warmer than the warmest shield (Standard).
So any of these shields looked stellar when comparing with the ASOS FARS  #-o
Well, not if they were side by side. I mean, you yourself verified the ASOS temp was spot on accurate only 2 or 3 weeks ago, right?
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Here is one to ponder everyone. The KVTN ASOS 1.3 mi distance, High was 87.1° today. That's still 2° warmer than the warmest shield (Standard).
So any of these shields looked stellar when comparing with the ASOS FARS  #-o
So the hard sucking FARS doesn’t matter, geography really makes the big difference. I'm sure I have my own summer micro climate with all the vegetation.
 

Looks like your other station (E7498), outside of town, hit 84 (still with the 7714?). So with more trees/turf around in town, 83 (FARS high) could be accurate. Either way, 83/84 seems entirely plausible to me. 

As for the airport, that's a head scratcher. Didn't you say that the local COOP observer has also been showing lower temps than the airport since the jump last year?
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Here is one to ponder everyone. The KVTN ASOS 1.3 mi distance, High was 87.1° today. That's still 2° warmer than the warmest shield (Standard).
So any of these shields looked stellar when comparing with the ASOS FARS  #-o
So the hard sucking FARS doesn’t matter, geography really makes the big difference. I'm sure I have my own summer micro climate with all the vegetation.
 
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