Matthew,
Would this situation not be able to be resolved if the WMR300 driver was
subjected to the (for want of a better term) 'removal of unnecessary
output' treatment that the vantage driver was given under 3.7.0? I see
there are archive records and loop packets where all 3 'pressures' are
None. If we follow the vantage model this should not happen, if or more of
these is known any of the missing 'pressures' should be calculated and if
all three are unknown (unreported) then all 3 should be omitted from the
loop packet/archive record. The user could then use the $latest tag in
reports to get the lastest barometer, altitude or pressure and for WU the
cached values added in (I think) 3.6.2 should cater for pressure only being
reported every 15 minutes.
To me going to a 15 or 30 minute or longer archive period is not much of a
solution.
Gary
On Saturday, 20 January 2018 21:23:27 UTC+10, Yngve Andersson wrote:
>
> Andrew
>
> I have now changed the time in weewx.conf to 1800 sec=30 minutes and
> WMR300 to 15 minutes (WMR300 can only select storage frequency to 1 minute,
> 5 minutes, 15 minutes and 60 minutes). We wait for results in an hour and
> then see.
>
>
> Thank you so much / Yngve
>
>
>
> Den lördag 20 januari 2018 kl. 12:37:27 UTC+2 skrev Andrew Milner:
>>
>> The .conf you posted had the interval set to 900 = 15 minutes, not 5, but
>> the station only outputs the pressure every 15 minutes - so perhaps your
>> archive interval needs to be 20-30 minutes in order to contain at least one
>> pressure reading
>>
>> Does the weather station have its interval set to the same value??
>>
>> I see that the station only supplies barometer in loop and rec packets,
>> and pressure in loop data and for rec packets weewx has to calculate
>> altimeter and pressure
>>
>> If you have a long archive interval (eg 30 minutes rather than the 5 i
>> suggested originally), and the station set to the same value, does it help??
>>
>> On Saturday, 20 January 2018 11:37:52 UTC+2, Yngve Andersson wrote:
>>
>>> Andrew
>>>
>>> Ok! has now changed the WMR300 logging interval to 5 minutes. I have
>>> waited a period of 900 seconds for the first REC, giving unchanged results.
>>> Attaches weewx.conf as it is running now!
>>>
>>> Best regards / Yngve
>>>
>>> Den lördag 20 januari 2018 kl. 10:52:28 UTC+2 skrev Andrew Milner:
>>>>
>>>> Can you post your weewx.conf - with sensitive passwords removed of
>>>> course.
>>>>
>>>> Weewx can be set to either generate archive records from hardware or
>>>> generate them by software. If the hardware rec always has the right data
>>>> then ensure that in weewx.conf - stdArchive section - you have got record
>>>> generation set to hardware
>>>>
>>>> 60 second archive interval is very small - usually one uses 5 minutes
>>>> (300 secs) - and may lead to other issues in generating reports etc which
>>>> is done at the archive interval - so at 60 seconds the reports may start
>>>> to
>>>> backlog a little
>>>>
>>>>
>>>>
>>>> On Saturday, 20 January 2018 10:41:05 UTC+2, Yngve Andersson wrote:
>>>>
>>>>>
>>>>> 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.
>>>>>>>
>>>>>>>
>>>>>>> p...@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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