Thanks,
Definitely wanted the extended schema as I have separate systems for 
recording energy consumption and heat pump data and only using gnuplot for 
visualisation. 

so for clean install I did the following:

   - stop the daemon
   - move the whole folder to weewx.bak (I had originally installed with 
   setup.py)
   - Download 4.1.1 and install according to 
   http://www.weewx.com/docs/setup.htm
   - manually make changes to weewx.conf (udev / ftp / WOW etc / 
   target_unit = *metricwx* to match old db)
   - copy old archive into new location
   - run(fix silly typos in weewx.conf :-O  ) run again

Works well, so 

   - update 
*wee_database weewx.conf --reconfigure *1100 seconds! later new database 
   done
   - rebuild dailys .... 50 minutes later
   - start

Everything seems good so far,

Now I just have to add in the temp_difference calc that I had, and have 
some fun with the extended schema

Thanks for the program and all the help



On Saturday, 10 October 2020 at 22:58:36 UTC+1 [email protected] wrote:

> If you want to do this, see the Wiki article *Switching to the new 
> wview_extended schema 
> <https://github.com/weewx/weewx/wiki/Switching-to-the-new-wview_extended-schema>*
>
> On Sat, Oct 10, 2020 at 2:47 PM weather list <[email protected]> wrote:
>
>> It works fine to just put the old .sdb file in the archive folder. If you 
>> night eventually want to make use of the new schema however, you might want 
>> to let the fresh install create a new .sdb and then import the data from 
>> the old one.
>>
>> On 10 Oct, 2020, at 11:00, [email protected] <[email protected]> wrote:
>>
>>
>> Hi,
>> I've been using and tinkering with Weewx since 2014; and a couple of 
>> little errors have accumulated so I'm taking the move to python 3 as an 
>> excuse to start afresh.
>>
>> I can't see if the schema has changed between 3.8 and 4.2, so could I do 
>> a clean install and replace the newly created archive with the backup from 
>> 3.8
>>
>> or should I do an upgrade first, backup, clean install and replace the 
>> archive with the upgraded backup?
>>
>> I checked wee_import but that only imports 'foreign' data
>>
>> Thanks,
>> Karl
>>
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