Gary,
That is very interesting and possibly important information. Is what you 
mention dependent on the type of logger used? Meaning is the data switching 
(LOOP1 / LOOP2) still an issue with the WLL?
 

On Tuesday, January 12, 2021 at 4:14:00 PM UTC-5 gjr80 wrote:

> Assuming can be a dangerous business! If you have not specified anything 
> for loop_request then you will be using LOOP1 only (the default), whether 
> that is the ‘best available format’ depends on your circumstances I guess. 
> Should you happen to specify loop_request = 3 in order to get the best of 
> both worlds (by alternating between LOOP1 and LOOP2 packets) be aware that 
> this can cause WeeWX loop packets to alternate between hardware provided 
> and software calculated values for station pressure and altimeter (and 
> archive records will then have a blend of both). If you do use loop_request 
> I suggest you carefully read the loop_request stanza 
> <http://weewx.com/docs/usersguide.htm#%5BVantage%5D> in the User’s Guide.
>
> Gary
>
>
> On Wednesday, 13 January 2021 at 06:12:20 UTC+10 [email protected] wrote:
>
>>
>> > If you don't have the latest firmware then you may not have Loop2 data. 
>> Not 
>> > having Loop2 data will inhibit greater Altimeter calculation by WeeWX 
>> > because station pressure will be missing and it will have to work 
>> backwards 
>> > and that is less accurate. Better to send the software station pressure 
>> > which is done by having Loop2 data. 
>>
>> According to the Davis site the latest firmward for the Vantage Pro2 is 
>> 3.15 and wee_device reports my console is at 3.15. I have not specified 
>> which LOOP data WeeWX is to use as I assume it is coded to use the best 
>> available format. 
>>
>

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