Thank you for your time. Everything is clear now. 

On Wednesday, 26 July 2023 at 09:31:42 UTC+2 [email protected] wrote:

> 1. Stop service on Raspberry PI. 
>
> 2. Copy WEEWX.SBD to your PC and open it with DB Browser for SQLite. 
>
>
> 3. Using the website https://www.epochconverter.com/ find the approximate 
> dateTime to find the position in the database and change the number in the 
> table "archive". 
>
> 4. Adjust the maximum value and time in the table "archive_day_xx". 
>
>
> 5. Write the changes to the file and copy it back to Raspberry PI.
>
> *6. Run sudo wee_database --reweight --date=YYYY-MM-DD (this affects only 
> the particular day you changed values for)*
> 7. Start the Weewx service. 
>
> The "reweight" option doesn't touch the min/max values and their 
> timestamp, you took care of that yourself in (4.)
>
> [email protected] schrieb am Mittwoch, 26. Juli 2023 um 06:36:17 UTC+2:
>
>>
>> How I hate Google Groups. It looks like I answer only to you Michael. 
>> To be short - your explanation helps me a lot. Thank you. 
>>
>> I have one more question. Here is how I do it now when I want to change 
>> something manually (for example the rain rate - which is quite often a 
>> problem). 
>>
>> 1. Stop service on Raspberry PI. 
>> 2. Copy WEEWX.SBD to my PC and open it with DB Browser for SQLite. 
>> 3. Using the website https://www.epochconverter.com/ find the 
>> approximate dateTime to find the position in the database and change the 
>> number in the table "archive". 
>> 4. After your explanation from yesterday change the number in the table 
>> "archive_day_rainRate". 
>> 5. Write the changes to the file and copy it back to Raspberry PI. 
>> 6. Start the Weewx service. 
>>
>> Is there any better way?
>>
>> On Tuesday, 25 July 2023 at 07:45:43 UTC+2 [email protected] wrote:
>>
>>> The values are in the "archive_day_*" tables in the database. These 
>>> tables contain a dateTime values,  min and max values as well as their 
>>> exact time (depending on the source), sum and weighted sum values and a 
>>> count. When you change a value in the archive table by hand, it won't show 
>>> up there, thus not show up in any statistics in the front end, as long as 
>>> you don't fix this in the proper way. 
>>> See https://weewx.com/docs/latest/utilities.htm#wee_database_utility 
>>> for a description of a tool that does it the proper way. Be aware, that 
>>> some actions might lead to loss in precision. For instance, the "exact 
>>> time" I mentioned before is then changed to the dateTime of the archive 
>>> value, e.g. when you maximum gust occurred at 8:33pm using a 5 min 
>>> archive_interval, it might happen, that after running the tool you maximum 
>>> gust will be shown at 8:35pm. Or, if your maximum temp was at 4:32pm 
>>> showing 30,1°C with a single loop value of 30,1°C, and all other loop 
>>> values were 30,0°C in that archive_interval, after running the tool, it 
>>> might be, that your maximum will read as 30,0°C at 1:15pm, if that was the 
>>> first interval that day, that had 30,0°C.
>>>
>>> [email protected] schrieb am Dienstag, 25. Juli 2023 um 06:37:12 UTC+2:
>>>
>>>> I had some problems with connections and also physical shocks on 
>>>> sensors. 
>>>> So, I stopped the Weewx service, copy the file /var/lib/weewx/weewx.sdb 
>>>> to my PC. I opened it with SQLiteDatabaseBrowser and change some extreme 
>>>> (unreal) results. For example wind and also rainRate which was caused by 
>>>> the son's ball :-)
>>>> After that, I copy the file back onto my server and start the Weewx 
>>>> service again. 
>>>> Now some changes are properly shown (for example in graphs), but the 
>>>> max results are old (unreal). I don't understand how this is calculated. I 
>>>> even tried "xstats" and it also shows old (unreal) max results. I checked 
>>>> again in the database and there are no old results there. 
>>>>
>>>> Any idea how to get rid of "unreal" results which should not apear in 
>>>> the database (and AFAIK they are not there anymore)?
>>>>
>>>> Here is the monthly graph where (for example) where we can see wind 
>>>> (VETER) max on the 18th and 19th of July. It was 65 km/h:
>>>> https://izo.amebis.si/belchertown/graphs/?graph=month
>>>>
>>>> Here is a summary where the max wind for July 2023 is 50 km/h:
>>>> https://izo.amebis.si/belchertown/
>>>>
>>>> It is similar to the rain rate. Max is 13107.0 mm/hr (unreal and I 
>>>> can't find this result in the database (I sorted the rain rate column, 
>>>> tried to check for the particular time ... there is no such data anymore). 
>>>>
>>>> Regards.
>>>
>>>

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