it is defined in weewx.conf [StdArchive] section in seconds, and is usually 
300 (5 minutes).

http://weewx.com/docs/usersguide.htm#StdArchive

If the hardware has a different archive interval weewx will use that.

if you stop weewx, and start it again the log when weewx is started will 
show the archive interval to be used.



On Tuesday, 23 July 2019 12:45:46 UTC+3, Danie Cillie wrote:
>
> It will stay at a certain value for example 51% for a long time even 
> though the loop value has changed drastically. Both the loop and archive 
> record values are correct when displayed on the terminal but that is not 
> what is written to the database.
> How does one determine the archive period over which the values are 
> averaged?
>
> On Tuesday, 23 July 2019 11:33:33 UTC+2, Andrew Milner wrote:
>>
>> how do you know it is 'stuck'??  the archived value is the AVERAGE of 
>> readings received during the archive period.  What values are displayed 
>> that you say are correct - the loop value or the archive record value??  
>> Remember that humidity does not change very quickly.
>>
>> On Tuesday, 23 July 2019 12:15:20 UTC+3, Danie Cillie wrote:
>>>
>>> Morning,
>>>
>>> I use a Raspberry Pi with the GroveWeatherRack and sensors and weewx.
>>>
>>> The grovePi driver sends the data directly to weewx.
>>>
>>> The LOOP data and the archive data as printed on the terminal when 
>>> weewxd runs is correct and updates correctly, but  the humidity data is 
>>> stored correctly the first time in the database and then gets stuck. 
>>> Sometimes after a long time (hours) it changes to a new value and sticks to 
>>> that again.
>>>
>>> I can not understand why the data is read and displayed correctly but 
>>> not stored in the database.
>>>
>>> The data on this page illustrates what the problem is 
>>> https://www.pwsweather.com/obs/IBLUERID2.html
>>>
>>> Please find the config file and log file attached.
>>>
>>> Any suggestions appreciated.
>>>
>>

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