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Heavy Weather Maximum/Minimum data

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Colin Miles:
I bought a WS2300 just before Christmas, but as the Review and Publisher programs weren't the kind of thing that I wanted I have written my own program. This takes the History file and creates new files which I can then display and manipulate as I want. However, the maximum and minimum data aren't shown in the history file, though obviously they are available as the HW program shows them. I can enter the data manually but it would be much easier to read it direct from HW. Anyone any ideas? I am only really interested in the Outdoor Temperature max/min and max Wind.

Many thanks

wuhu_software:

--- Quote from: "Colin Miles" ---I bought a WS2300 just before Christmas, but as the Review and Publisher programs weren't the kind of thing that I wanted I have written my own program. This takes the History file and creates new files which I can then display and manipulate as I want. However, the maximum and minimum data aren't shown in the history file, though obviously they are available as the HW program shows them. I can enter the data manually but it would be much easier to read it direct from HW. Anyone any ideas? I am only really interested in the Outdoor Temperature max/min and max Wind.

Many thanks
--- End quote ---


Colin,

Why not have your software just scan the data to determine the mix/max for these values?

Also, if you upload your data to Weather Underground, they have nice tools to determine min/max, charts, etc.

Colin Miles:
Thanks for your quick reply. Determining the min/max from existing data isn't a problem and for many days that is sufficient for everything except the wind. However, I only sample every 10 minutes and this can miss temporary peaks and troughs in the temperature. Usually this is at most only a couple of tenths of a degree so I am probably being a bit too fussy. But with the wind it is a different matter. It is very unusual to capture the maximum gust with this sort of sampling interval.

Incidentally when I said I used the history.dat file, that is incorrect. I use the saved text file from that.

wuhu_software:

--- Quote from: "Colin Miles" ---Thanks for your quick reply. Determining the min/max from existing data isn't a problem and for many days that is sufficient for everything except the wind. However, I only sample every 10 minutes and this can miss temporary peaks and troughs in the temperature. Usually this is at most only a couple of tenths of a degree so I am probably being a bit too fussy. But with the wind it is a different matter. It is very unusual to capture the maximum gust with this sort of sampling interval.

Incidentally when I said I used the history.dat file, that is incorrect. I use the saved text file from that.
--- End quote ---


Are you actively monitoring the history file?

Why not detect all changes to the file and then only write to your text file every ten minutes?

As you mentioned HW is able to detect all lows and highs because it is sampling all of the records. There are no summary records, so you must read them all if you want to capture all of the data.

What are you doing with this data? Posting it to the web?

Thanks.

Colin Miles:
HW is set to sample every 10 minutes. At various times, when convenient, I download these to my computer onto the history.dat file. I then save these as text. These are then read into my program. This is set up to recreate monthly and yearly text files. The program then creates whatever graphs and data that I require.

Does the history.dat file contain the max/min data? If it does then presumably there is some way of extracting it.

I don't publish to the web. Many thanks for your replies.

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