I thought I'd have a go at creating a new service now. I've got most of the
code in place and I've got the service to run, but I'm struggling a bit
with the formula.
The actual formula's very long so I've made up a short, fake one for the
purposes of this post which is 'outTemp * outHumidity + 5'.
The code for the service is therefore as follows:
*import weewxfrom weewx.engine import StdServiceclass
MyHeatIndex(StdService): def __init__(self, engine, config_dict):
# Pass the initialization information on to my superclass:
super(MyHeatIndex, self).__init__(engine, config_dict)
self.bind(weewx.NEW_ARCHIVE_RECORD, self.new_archive_record) def
new_archive_record(self, record): record['heatindex'] =
my_fancy_formula(record['outTemp'] * record['outHumidity'] + 5)*
When I tried running that (with the actual formula in place), it says that
my_fancy_formula isn't defined. I've read up about this but I'm unsure how
to fix this - any help would be appreciated.
Thanks
On Thursday, 15 June 2017 19:44:40 UTC+1, Tom Keffer wrote:
>
> The "weewx way" would be to write a simple service that binds to the
> NEW_ARCHIVE_RECORD events and replaces the value of heatindex with the
> results of your calculation. Something like (NOT TESTED):
>
> from weewx.engine import StdService
> class MyHeatIndex(StdService):
>
> def __init__(self, engine, config_dict):
> # Pass the initialization information on to my superclass:
> super(MyHeatIndex, self).__init__(engine, config_dict)
> self.bind(weewx.NEW_ARCHIVE_RECORD, self.new_archive_record)
>
> def new_archive_record(self, record):
> record['heatindex'] = my_fancy_formula(record['windGust'],
> record['outTemp'], ........)
>
> Run the service *after* StdWXCalculate.
>
> See the section *Creating a new service
> <http://weewx.com/docs/customizing.htm#Adding_a_service>* for details.
>
> -tk
>
>
> On Thu, Jun 15, 2017 at 9:52 AM, David Watts <[email protected]
> <javascript:>> wrote:
>
>> Hi
>>
>> I want to tinker with the 'heat index' formula in wxformulas.py and
>> introduce wind gusts and speed into it.
>>
>> I notice the wind speed is available (V_mph, used for wind chill) but how
>> would I introduce the wind gust?
>>
>> Thanks
>>
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>
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