This is unlikely to be a units problem, rather it is likely to be one of 
incorrect (or a lack of) data from the station. FineOffset stations provide 
the WeeWX field pressure and WeeWX will then calculate fields barometer and 
altimeter if possible. The log entry provided indicates that WeeWX has 
ended up with a pressure value of zero which is outside the (default) QC 
limits set in [StdQC] [[MinMax]] in weewx.conf. You need to be looking at 
what data is being emitted by the station/driver; with the fousb driver you 
should be able to use weectl device 
<http://weewx.com/docs/5.0/utilities/weectl-device/> to interrogate the 
station and, among other things, display live data from the station 
<http://weewx.com/docs/5.0/hardware/fousb/#fousb_configuration>. The result 
may well give you an indication of where the problem is.

As an aside the units used within the [StdQC] [[MinMax]] stanza and the 
display units in reports (or on a station hardware display) bear no direct 
relationship. [[MinMax]] settings default to the units used in the WeeWX 
database; however, units can be specified. As it happens the default 
[[MinMax]] settings have US customary units specified. You may find it 
beneficial to read through the [StdQC] reference 
<http://weewx.com/docs/5.0/reference/weewx-options/stdqc/>.

Gary
On Wednesday 7 February 2024 at 07:03:37 UTC+10 [email protected] wrote:

> I'll take a wild guess..maybe it's a unit mismatch of some sort. Try 
> switching your console to inHg instead of hPa (temporarily) and see if that 
> works.
>
> On Tuesday, February 6, 2024 at 7:05:58 AM UTC-5 [email protected] 
> wrote:
>
>> The warning tells you: WeeWX is receiving 0.0 for "pressure". You say, 
>> "The hardware console is operating correctly as expected", so the problem 
>> is somewhere in between the hardware and the LOOP. It may be, that your 
>> hardware/driver combination doesn't supply a valid value for "pressure" (it 
>> should return "None" instead of "0.0" in this case), did you try 
>> "barometer" or "altimeter" instead? You can also check in your database, if 
>> there are values for these types. If so, take a look into this article 
>> <https://github.com/weewx/weewx/wiki/Barometer,-pressure,-and-altimeter>, 
>> to make sure, you really use the correct type for your needs. Having only 
>> one out of the three "pressure", "altimeter" and "barometer", it should be 
>> possible to calculate the others, when you have the altitude, the 
>> temperature and humidity (or even something in addition to that).
>>
>> Alan Salmon schrieb am Dienstag, 6. Februar 2024 um 12:48:48 UTC+1:
>>
>>> Hello everyone.
>>>
>>> I installed weewx for the first time today on a Raspberry Pi Zero 2W, 
>>> using a Fine Offset 3081 station that I used for about 10 years until the 
>>> local cockatoos decided it would be fun to dismantle it!
>>>
>>> It came up on the second attempt after a few minor adjustments to the 
>>> config file, paths, etc. (I used the pip install method on Debian 11).
>>>
>>> The hardware console is operating correctly as expected, but weewx is 
>>> giving me the following error:
>>>
>>> Feb  6 22:26:01 bigfish-08 weewxd[1909]: WARNING weewx.qc: 2024-02-06 
>>> 22:26:02 AEDT (1707218762) LOOP value 'pressure' 0.0 outside limits (24.0, 
>>> 34.5)
>>>
>>> As the value displayed on the console (roughly) agrees with a BME680 I 
>>> have running, can anyone suggest where I should start trying to solve this?
>>>
>>> Note that I am configured for metric with barometric pressure in 
>>> hectopascals (hPa) which is currently just over 1010hPa, so I am at a bit 
>>> of a loss as to why it is showing '0.0' and where the range "24.0 to 34.5' 
>>> comes from.
>>>
>>> The error has been consistent for the 9 hours it has been running.
>>>
>>> Thanks for any advice you can offer.
>>>
>>>
>>>

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