Notes on ...
After the Weewx program has stopped (for some reason?) And been turned off
for a few hours, I now restart with the command "*sudo weewxd weewx.conf*".
There is now a list of "REC" with historically stored values from the
time weewx stopped. Measurement values displayed here with a range of 60
seconds and up to the current time look correct (see attached print).
(WMR300 is initially set to log 1 time/60seconds... if now this may be
important?). These historical "REC" are now scrolling to return to normal
running ("LOOP" and "REC, every 900 seconds") and now again with
"altimeter: None and barometer: None" display.
It's tricky to describe the procedure, but I hope it's understandable.
A thought and wonder from a novice ... if the 60 seconds measured values in
the WMR300 are correct why not read and present the nearest historically
stored value?
Sincerely Yngve
Den lördag 20 januari 2018 kl. 02:12:02 UTC+2 skrev Yngve Andersson:
>
> The time between two "REC" 01:45:00 - 02:00:00 is exactly 900 seconds. The
> reading was done manually from the terminal. Also noted that reading values
> showed "altimeter: None, appTemp: 19.6444928978, barometer: None"
>
> Den fredag 19 januari 2018 kl. 22:01:42 UTC+2 skrev Yngve Andersson:
>>
>> Thank you, *mwall *for your quick response and dedication!
>>
>>
>> The time is set to 900 seconds, also tested 1200 seconds with the same
>> result.
>>
>> I'm not familiar with the "sqlite3" program, so it needed an
>> installation. Then I come so far.
>>
>>
>> pi@raspberrypi:~$ sqlite3 /var/lib/weewx.sdb
>>
>> SQLite version 3.16.2 2017-01-06 16:32:41
>>
>> Enter ”.help” for usage hints.
>>
>> Sqlite> select dateTime,pressure,barometer,altimeter from archive
>>
>> - - >
>>
>>
>>
>> Den fredag 19 januari 2018 kl. 20:42:39 UTC+2 skrev mwall:
>>>
>>> yngve,
>>>
>>> thank you for a detailed problem description!
>>>
>>> wu can be very unreliable about displaying data, so we should first
>>> ensure that weewx is getting correct data from the hardware.
>>>
>>> as you know, the wmr300 emits a pressure reading only every 900 seconds.
>>> so if you have an archive interval of 300 seconds, only every 3rd archive
>>> record will have a value for pressure.
>>>
>>> however, your archive interval of 900 seconds should address this.
>>>
>>> how often do you have records (REC not LOOP) with no
>>> pressure/altimeter/barometer?
>>>
>>> you can find out easily by doing a query on the weewx database:
>>>
>>> sqlite3 /var/lib/weewx.sdb
>>> select dateTime,pressure,barometer,altimeter from archive
>>>
>>> m
>>>
>>>
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REC measure 1
Description: Binary data
