Final note on this: Commit a978796
<http://%5B%5BCorrections%5D%5D%20%20%20%20%20%20%20%20%20#%20For%20each%20type,%20an%20arbitrary%20calibration%20expression%20can%20be%20given.%20%20%20%20%20%20%20%20%20%23%20It%20should%20be%20in%20the%20units%20defined%20in%20the%20StdConvert%20section.%20%20%20%20%20%20%20%20%20%23%20Example:%20%20%20%20%20%20%20%20%20foo%20=%20foo%20+%200.2%20%09pf%20=%200.88%20%20%20%20%20%20%20%20%20consumption%20=%20((ampere%20*%20linevoltage)%20/1000)%20*%20pf>
allows one to apply corrections to only archive records, even if they came
from software. So, you could do
[[Corrections]]
pf = 0.88
consumption = ((ampere * linevoltage) /1000) * pf, archive
This is not precisely what you want, because it is applying the expression
to the product of the *average* amperage times the *average* linevoltage,
but it would get you close.
-tk
On Tuesday, October 17, 2023 at 9:17:44 PM UTC-7 [email protected] wrote:
> Thank you Tom
> the service file is doing exactly what we needed.
>
> GOD bless you
>
> On Wednesday, October 18, 2023 at 7:01:27 AM UTC+3 Mks Mk wrote:
>
>>
>> added import weewx to the top of file
>> it worked
>>
>> On Wednesday, October 18, 2023 at 6:50:58 AM UTC+3 Mks Mk wrote:
>>
>>> there is nothing in the log file related to the correction
>>>
>>> we tried the service but it failed twice
>>>
>>> 1st run failed with error:
>>>
>>> Oct 18 06:37:20 debian weewx[3413] CRITICAL __main__: **** File
>>> "/usr/share/weewx/user/myservice.py", line 10
>>> Oct 18 06:37:20 debian weewx[3413] CRITICAL __main__: **** def
>>> new_archive_record(self, event)
>>> Oct 18 06:37:20 debian weewx[3413] CRITICAL __main__: ****
>>> ^
>>> Oct 18 06:37:20 debian weewx[3413] CRITICAL __main__: ****
>>> SyntaxError: invalid syntax
>>> Oct 18 06:37:20 debian weewx[3413] CRITICAL __main__: **** Exiting.
>>>
>>> changed to
>>>
>>> def new_archive_record(self, event):
>>>
>>> run weewx again but failed with error
>>>
>>>
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: **** File
>>> "/usr/share/weewx/weewxd", line 148, in main
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: ****
>>> engine = weewx.engine.StdEngine(config_dict)
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: **** File
>>> "/usr/share/weewx/weewx/engine.py", line 93, in __init__
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: ****
>>> self.loadServices(config_dict)
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: **** File
>>> "/usr/share/weewx/weewx/engine.py", line 161, in loadServices
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: **** obj
>>> = weeutil.weeutil.get_object(svc)(self, config_dict)
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: **** File
>>> "/usr/share/weewx/user/myservice.py", line 8, in __init__
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: ****
>>> self.bind(weewx.NEW_ARCHIVE_RECORD, self.new_archive_record)
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: ****
>>> NameError: name 'weewx' is not defined
>>> Oct 18 06:42:20 debian weewx[3603] CRITICAL __main__: **** Exiting.
>>>
>>> On Wednesday, October 18, 2023 at 4:42:59 AM UTC+3 Tom Keffer wrote:
>>>
>>>> Just had a thought.
>>>>
>>>> I assume that weewxd is using software record generation. Check in the
>>>> log. If so, [[Corrections]] does not apply the corrections to archive
>>>> records because, in theory, the correction should have already been
>>>> applied
>>>> in the LOOP packets. Obviously that's not happening here.
>>>>
>>>> I've created issue #895 <https://github.com/weewx/weewx/issues/895> to
>>>> track.
>>>>
>>>> In the meantime, what you can do is create a simple service
>>>> <https://www.weewx.com/docs/customizing.htm#Adding_a_service> to do
>>>> the calculation. It would look something like this (NOT TESTED):
>>>>
>>>> from weewx.engine import StdService
>>>>
>>>> class Power(StdService):
>>>>
>>>> def __init__(self, engine, config_dict):
>>>> super(Power, self).__init__(engine, config_dict)
>>>>
>>>> self.bind(weewx.NEW_ARCHIVE_RECORD, self.new_archive_record)
>>>>
>>>> def new_archive_record(self, event)
>>>> ampere = event.record.get('ampere')
>>>> linevoltage = event.record.get('linevoltage')
>>>> if ampere is not None and linevoltage is not None:
>>>> event.record['consumption'] = ampere * linevoltage
>>>> else:
>>>> event.record['consumption'] = None
>>>>
>>>> This will work provided that linevoltage and ampere do not vary too
>>>> much over the archive interval. Because you are using short intervals (60
>>>> seconds), this is probably not much of a problem.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Tue, Oct 17, 2023 at 6:12 PM Mks Mk <[email protected]> wrote:
>>>>
>>>>> from database
>>>>>
>>>>> dateTime usUnits interval consumption ampere
>>>>> linevoltage pf
>>>>> 1697583060 1 1 90.84233333
>>>>> 141 0.9
>>>>> 1697583120 1 1 110.3686667
>>>>> 141 0.9
>>>>> 1697583180 1 1 77.51766667
>>>>> 140.5 0.9
>>>>> 1697583240 1 1 101.4843333
>>>>> 141 0.9
>>>>> 1697583300 1 1 100.0026667
>>>>> 141 0.9
>>>>> 1697583360 1 1 4.977666667
>>>>> 141 0.9
>>>>> 1697583420 1 1 4.907666667 142
>>>>> 0.9
>>>>> 1697583480 1 1 4.927666667 141.5
>>>>> 0.9
>>>>> 1697583540 1 1 4.886
>>>>> 141.3333333 0.9
>>>>> 1697583600 1 1 4.867666667
>>>>> 141 0.9
>>>>> 1697583660 1 1 4.877666667
>>>>> 141 0.9
>>>>> 1697583720 1 1 78.94533333
>>>>> 141 0.9
>>>>> 1697583780 1 1 90.26166667
>>>>> 140.6666667 0.9
>>>>>
>>>>>
>>>>> On Wednesday, October 18, 2023 at 3:35:05 AM UTC+3 Mks Mk wrote:
>>>>>
>>>>>> Hi Gary
>>>>>>
>>>>>> it all started here
>>>>>> https://groups.google.com/g/weewx-user/c/ltOVkcY1fKc/m/7sQSVGN_AQAJ
>>>>>>
>>>>>> we were using fixed value for the incoming grid line to calculate the
>>>>>> consumption but it was not accurate enough so we added new sensor to
>>>>>> read
>>>>>> the grid incoming line voltage.
>>>>>> earlier this formula worked consumption = ampere * 117 / 1000 * 0.88
>>>>>> but consumption = ampere * linevoltage / 1000 * 0.88 did not work
>>>>>> the linevoltage input comes from different sensor than ampere,
>>>>>> these two reading are generated in different loops, so based on Tom
>>>>>> advice
>>>>>> the weewx correction will not work
>>>>>> thank you
>>>>>>
>>>>>> On Wednesday, October 18, 2023 at 1:28:55 AM UTC+3 gjr80 wrote:
>>>>>>
>>>>>>> So what does
>>>>>>>
>>>>>>> consumption = ((ampere * linevoltage) /1000) * 0.88
>>>>>>>
>>>>>>> do?
>>>>>>>
>>>>>>> Gary
>>>>>>> On Wednesday, 18 October 2023 at 08:26:25 UTC+10 [email protected]
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Hi Tom
>>>>>>>>
>>>>>>>> we run weewx directly and found that 'ampere' & 'linevoltage' are
>>>>>>>> in different loop because the data are coming from two different
>>>>>>>> sensors by
>>>>>>>> sdr.py driver.
>>>>>>>> how we can combine these loops into one so weewx can process this
>>>>>>>> formula, or what can we do to get this calculation done.?
>>>>>>>>
>>>>>>>> Thank you for your support
>>>>>>>>
>>>>>>>> On Tuesday, October 17, 2023 at 9:26:38 PM UTC+3 Tom Keffer wrote:
>>>>>>>>
>>>>>>>>> The only symbols that can be used in the [[Corrections]] formula
>>>>>>>>> are other types in the archive record. So unless 'ampere',
>>>>>>>>> 'linevoltage',
>>>>>>>>> and 'pf' all appear in the record, the correction will not work.
>>>>>>>>>
>>>>>>>>> On Tue, Oct 17, 2023 at 9:48 AM Mks Mk <[email protected]> wrote:
>>>>>>>>>
>>>>>>>>>> we want to improve the accuracy of our home energy monitor and we
>>>>>>>>>> added new sensor to read the main line voltage so we got two sensors
>>>>>>>>>> and
>>>>>>>>>> the data is logged in weewx database.
>>>>>>>>>>
>>>>>>>>>> [[sensor_map]]
>>>>>>>>>>
>>>>>>>>>> ampere = current.***.EfPacket
>>>>>>>>>> linevoltage = payload5.*****.RadioHeadASKPacket
>>>>>>>>>>
>>>>>>>>>> the database have these columns which we created
>>>>>>>>>>
>>>>>>>>>> consumption
>>>>>>>>>> ampere
>>>>>>>>>> linevoltage
>>>>>>>>>> pf
>>>>>>>>>>
>>>>>>>>>> we want to calculate the energy consumption so we added this
>>>>>>>>>> correction
>>>>>>>>>>
>>>>>>>>>> [StdCalibrate]
>>>>>>>>>>
>>>>>>>>>> [[Corrections]]
>>>>>>>>>> # For each type, an arbitrary calibration expression can
>>>>>>>>>> be given.
>>>>>>>>>> # It should be in the units defined in the StdConvert
>>>>>>>>>> section.
>>>>>>>>>> # Example:
>>>>>>>>>> foo = foo + 0.2
>>>>>>>>>> pf = 0.88
>>>>>>>>>> consumption = ((ampere * linevoltage) /1000) * pf
>>>>>>>>>>
>>>>>>>>>> unfortunately weewx did nothing nor it complained about it. can
>>>>>>>>>> weewx process such formula?
>>>>>>>>>>
>>>>>>>>>> thanks
>>>>>>>>>>
>>>>>>>>>> --
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>>>>>>>>>> https://groups.google.com/d/msgid/weewx-user/26effb7c-ad33-4de8-a9a0-f1390012ec5an%40googlegroups.com
>>>>>>>>>>
>>>>>>>>>> <https://groups.google.com/d/msgid/weewx-user/26effb7c-ad33-4de8-a9a0-f1390012ec5an%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>>>>> .
>>>>>>>>>>
>>>>>>>>> --
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>>>>>
>>>> To view this discussion on the web visit
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>>>>>
>>>>> <https://groups.google.com/d/msgid/weewx-user/fa342793-222a-4773-9bde-5bf97cf88dddn%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>> .
>>>>>
>>>>
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