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Author Topic: Important Info for Davis VP USB data logger users and potential users  (Read 74857 times)

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Offline Weather Display

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Re: Important Info for Davis VP USB data logger users and potential users
« Reply #105 on: March 23, 2016, 08:07:01 PM »
is com port 7 the correct com port?
does the data received light flash in WD?

Offline FredFanackapan

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Re: Important Info for Davis VP USB data logger users and potential users
« Reply #106 on: March 23, 2016, 08:18:44 PM »
Windows Device Manager under Ports says that the Silicon Labs CP210x USB to UART Bridge is on COM7
The comport is set to 7 under Control Panel, Station Settings, COM/IP Port

The Green light is flashing but next to it it says Data Received 0
Below it the light is red

Offline Weather Display

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Re: Important Info for Davis VP USB data logger users and potential users
« Reply #107 on: March 23, 2016, 10:30:07 PM »
what is the barometer offset in WD set to and what is the barometer reading showing on the Davis console
also if you set in WD to use the altimeter barometer in the CWOP setup
then try unticking that
then restart WD

Offline FredFanackapan

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Re: Important Info for Davis VP USB data logger users and potential users
« Reply #108 on: March 23, 2016, 10:41:10 PM »
We might be getting somewhere. I've been trying to get the baro reading the same as the QNH of my local airport.

The box on the left of the Baro offset reads 1021.0. The box to the right of the Set button is empty. The console reads 1015 at the moment.

No boxes ticked in the CWOP setup.
« Last Edit: March 23, 2016, 10:45:17 PM by FredFanackapan »

Offline FredFanackapan

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Re: Important Info for Davis VP USB data logger users and potential users
« Reply #109 on: March 23, 2016, 11:32:26 PM »
I set the baro offset to zero.

It now works!

Thanks for your help, sorry I've been so stupid but I didn't think that an offset would cause a coms problem.

Offline Weather Display

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Re: Important Info for Davis VP USB data logger users and potential users
« Reply #110 on: March 23, 2016, 11:33:35 PM »
note that it's a barometer offset
having an offset of 1021 will try and add 1021 hpa to the current barometer reading
and so then WD will ignore the data

the offset you set needs to be the difference between your barometer reading on your weather station and your local metar
e.g if metar is reading 5 hpa higher than your reading, then the offset you set is 5


Offline FredFanackapan

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Re: Important Info for Davis VP USB data logger users and potential users
« Reply #111 on: March 23, 2016, 11:52:45 PM »
Many thanks!