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Synchronise Davis clock to PC

Discussion specific to Davis weather stations
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MikeinTX
Posts: 10
Joined: Fri 02 Apr 2010 2:09 pm
Weather Station: Davis VP2
Operating System: Windows XP

Synchronise Davis clock to PC

Post by MikeinTX »

I have my PC synced to a time server in the US named U.S. Naval Observatory. I was running Weatherlink and the PC clock and my VP2 console would always be in sync. Now that I am running Cumulus the Davis clock gets behind my PC by from 14 to 36 seconds as observed so far. What I think is happening is each time I start Cumulus with "Synchronise(sp Synchronize) Davis clock to PC" ticked then only the hour and minutes go to the Davis console from Cumulus.

Not a big problem so just wondering if this is indeed the problem and if it might can be fixed sometime? Using v1.8.9 Cumulus.

Thanks
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steve
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Re: Synchronise Davis clock to PC

Post by steve »

The Davis DLL only allows setting the clock to the nearest minute, so there's nothing I can do. Except, perhaps, set the clock on the minute; but this would involve either waiting at start up for the next minute, or somehow synchronising with the normal data reading process, which is a bit tricky.

The Vantage Pro serial protocol allows the time to be set to the nearest second, so it's odd that the DLL doesn't. Cumulus 2 drives the station directly, so I'll be able to set it to the second in that.
Steve
MikeinTX
Posts: 10
Joined: Fri 02 Apr 2010 2:09 pm
Weather Station: Davis VP2
Operating System: Windows XP

Re: Synchronise Davis clock to PC

Post by MikeinTX »

steve wrote:The Davis DLL only allows setting the clock to the nearest minute, so there's nothing I can do. Except, perhaps, set the clock on the minute; but this would involve either waiting at start up for the next minute, or somehow synchronising with the normal data reading process, which is a bit tricky.

The Vantage Pro serial protocol allows the time to be set to the nearest second, so it's odd that the DLL doesn't. Cumulus 2 drives the station directly, so I'll be able to set it to the second in that.

OK, no problem, I'll untick the option for now and wait for Cumulus 2.
RayProudfoot
Posts: 3602
Joined: Wed 06 May 2009 6:29 pm
Weather Station: Davis VP2 with Daytime FARS
Operating System: Windows XP SP3
Location: Cheadle Hulme, Cheshire, England
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Re: Synchronise Davis clock to PC

Post by RayProudfoot »

There's a program called VPLive which will keep the console time synched with the PC. Unfortunately it cannot run alongside Cumulus (or any other program) unless you use a program called VirtualVP which provides up to 4 virtual COM ports.

I'm running Cumulus, Cumulus2, WeatherLink and VPLive all via VVP. You can find out about VPLive here and VVP here.
Cheers,
Ray, Cheshire.

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MikeinTX
Posts: 10
Joined: Fri 02 Apr 2010 2:09 pm
Weather Station: Davis VP2
Operating System: Windows XP

Re: Synchronise Davis clock to PC

Post by MikeinTX »

RayProudfoot wrote:There's a program called VPLive which will keep the console time synched with the PC. Unfortunately it cannot run alongside Cumulus (or any other program) unless you use a program called VirtualVP which provides up to 4 virtual COM ports.

I'm running Cumulus, Cumulus2, WeatherLink and VPLive all via VVP. You can find out about VPLive here and VVP here.


Thanks but I don't really have a problem when Cumulus does not sync the time on the console.

I run a time setting program called AboutTime.exe and have it set to run as a scheduled task every 6 hours. The Davis VP2 console is very good at keeping the correct time and it is only a PC that can't keep up with the correct time.

I'll wait on Cumulus 2 as I said I don't really have a problem.
RayProudfoot
Posts: 3602
Joined: Wed 06 May 2009 6:29 pm
Weather Station: Davis VP2 with Daytime FARS
Operating System: Windows XP SP3
Location: Cheadle Hulme, Cheshire, England
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Re: Synchronise Davis clock to PC

Post by RayProudfoot »

Okay, no problem. :)
Cheers,
Ray, Cheshire.

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gemini06720
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Joined: Mon 10 Aug 2009 10:16 pm
Weather Station: No weather station
Operating System: No operating system
Location: World...

Re: Synchronise Davis clock to PC

Post by gemini06720 »

MikeinTX wrote:...I run a time setting program called AboutTime.exe...
I cannot believe that anyone other than me was still running that very old (by computer time) utility - I have AboutTime running on all of my computers (even the one running under Windows 7), neatly sitting in the system tray and doing its time synchronization every 6 hours... :)
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RCE
Posts: 106
Joined: Sat 26 Dec 2009 7:59 am
Weather Station: WH1080
Operating System: Vista
Location: Sheffield UK

Re: Synchronise Davis clock to PC

Post by RCE »

I am running it too... if it ain't broke don't fix it :D
====
Alan
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Eurastus
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Joined: Fri 01 Jan 2010 6:32 pm
Weather Station: Davis Vantage Pro2 Plus
Operating System: Win XP SP3
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Re: Synchronise Davis clock to PC

Post by Eurastus »

AboutTime runs on all my computers. It's simple and effective. Great software.
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