parsing weather data for calculations

[Bernhard Walser]

Hello Im using a rasperry 3 weewx  v3.9.2 and i want to add some special data and also use this for some pin outputs (heating on-of for melting snow and so one).

Therefore i installed your filepille extension and add some code.

I now have to import data like outTemp to calculate an wetbulb temperatur. I tried many parses and it worked in wxformulas but only for HTML but there are no recordet data for images or max min values.

Does anybody know the right import and parsing to put in filepille.py, for a value like current.outTemp?

[Tom Keffer]

If I am understanding your question correctly, the current temperature can be obtained from NEW_ARCHIVE_RECORD event:

    def new_archive_record(self, event):
        temperature = event.record['outTemp']

        ...

Is that what you need?

Be aware that the value may be None, or even missing. So a better approach is:

    def new_archive_record(self, event):
        temperature = event.record.get('outTemp')

        if temperature is not None:

            # Calculate wet bulb temperature

            ...

-tk

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[Bernhard Walser]

That is exactly what i mean!

Thank you for your help, and also a big thank for your great software witch can adaptet to nealry everything!