Short update:
I have found out that my plugin is executed via data_services each time a
loop package is generated and this is approximatly every 3 seconds.
An archive dataset is written every 60 seconds, leading to chance of 1/20
that the raindelta is saved correctly - thats too less :-D
So I see two possible solutions:
1. The data service is only executed once before the archiv dataset is
written. Has anybody a idea how this could be done?
2. I have access to some kind of software flag saying that a archive record
has been written.
I had also a look into the vantage driver and I think this piece of code
does the magic of calculating the data:
# Because the Davis stations do not offer bucket tips in LOOP data,
we
# must calculate it by looking for changes in rain totals. This
won't
# work for the very first rain packet.
if self.save_monthRain is None:
delta = None
else:
delta = loop_packet['monthRain'] - self.save_monthRain
# If the difference is negative, we're at the beginning of a
month.
if delta < 0: delta = None
loop_packet['rain'] = delta
self.save_monthRain = loop_packet['monthRain']
return loop_packet
But I do not understand how overwriting the delta is prevented here.
Hoping for some replys.
Best wishes,
engolling
Am Sonntag, 3. März 2019 13:16:49 UTC+1 schrieb engolling:
>
> Hello,
> I tried to implement a driver providing the rainfall in intervall but
> until now it does not work as expected.
>
> I'am able to handle the correct data to WeeWx with this command:
> syslog.syslog(syslog.LOG_DEBUG, "WeatherDuino: " +
> str(names[n+1]) + ": " + str(deltarain))
> event.record[str(names[n+1])] = float(deltarain)
> The debug log output says:
>
>> Mar 3 11:56:16 WeatherDuinoPi weewx[1366]: WeatherDuino: Rain_RG11:
>> 0.17716535433
>>
>
> But in the database there is a "0" logged.
>
> If i change the code hardcoding the rain intervall to 10 it works fine.
> syslog.syslog(syslog.LOG_DEBUG, "WeatherDuino: " +
> str(names[n+1]) + ": " + str(10))
> event.record[str(names[n+1])] = 10
>
> So I think my driver is executed more often then my one minute logging
> intervall and so the value of the event.record is overwritten with a zero
> again - because the driver thinks the value is already in the WeeWx
> database.
>
> You can find my code here:
> https://github.com/menachers/WeatherDuino/tree/master/WeeWx_Plugin
>
> It is embedded in the weewx.conf:
> # This section configures the internal weewx engine.
>
> [Engine]
>
> [[Services]]
> # This section specifies the services that should be run. They are
> # grouped by type, and the order of services within each group
> # determines the order in which the services will be run.
> prep_services = weewx.engine.StdTimeSynch
> data_services = user.WeeWx_WeatherDuino_Logger_plugin.WeeWxService
> ,
> process_services = weewx.engine.StdConvert, weewx.engine.
> StdCalibrate, weewx.engine.StdQC, weewx.wxservices.StdWXCalculate
> archive_services = weewx.engine.StdArchive
> restful_services = weewx.restx.StdStationRegistry, weewx.restx.
> StdWunderground, weewx.restx.StdPWSweather, weewx.restx.StdCWOP, weewx.
> restx.StdWOW, weewx.restx.StdAWEKAS
> report_services = weewx.engine.StdPrint, weewx.engine.StdReport
>
> Regards,
> engolling
>
>
> Am Samstag, 23. Februar 2019 14:10:36 UTC+1 schrieb Andrew Milner:
>>
>> weewx requires rain during archive interval for storing in the database
>> archive records. A driver may have to convert whatever it receives (eg
>> running total) so as to obtain the value for the interval. Daily is
>> accumulated by weewx from the archive interval values and weekly and
>> monthly are derived form the daily totals. This is possibly an over
>> simplification - but should give the idea.
>>
>> so if the second source gives a value for rainfall in interval it should
>> be enough for weewx to derive the remainder.
>>
>>
>>
>> On Saturday, 23 February 2019 12:30:38 UTC+2, engolling wrote:
>>>
>>> Hello community,
>>>
>>> I would like to add an additional rain gauge as additional source
>>> described in the customization guide.
>>> Can you give me any hints how to do this the easiest way, to get the
>>> daily, weekly and monthly percipation.
>>> Can I use any modules or calculations that are already done inside the
>>> system or is this normally done by the corresponding driver, so I have to
>>> handle all the signals precalculated.
>>>
>>> I hope you understand what I mean.
>>>
>>> Best Regards,
>>> engolling
>>>
>>
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