Perfect. I agree. 

Thank you


On Thursday, July 30, 2020 at 9:57:53 PM UTC-4 gjr80 wrote:

> To complete the trifecta b9 will (by default) map the GW1000 Absolute 
> Pressure to WeeWX field pressure and the StdWXCalculate service can then 
> be used to calculate WeeWX fields barometer and altimeter. GW1000 
> Relative Pressure will be mapped through (again by default) to WeeWX field 
> relbarometer. As such it will be available for use by folks in reports 
> via the $current.relbarometer tag but will essentially have no other 
> affect unless folks include relbarometer in their db schema. Should 
> anyone want to map GW1000 Relative Pressure to WeeWX field barometer or 
> altimeter (or for that matter any other field) they can do so by adding 
> an appropriate field map entry entry under [GW1000] in weewx.conf.
>
> I think this gives us a practical and realistic default supported by 
> precedent whilst giving users the ability to tailor the behaviour to suit 
> their tastes.
>
> Gary
>
> On Friday, 31 July 2020 02:01:28 UTC+10, galfert wrote:
>>
>> I believe that this is exactly how Meteobridge also works. It just uses 
>> Absolute. I think this is probably the best solution.
>>
>> On Thursday, July 30, 2020 at 8:22:46 AM UTC-4 gjr80 wrote:
>>
>>> Looking at the WeeWX fousb driver it actually discards Relative Pressure 
>>> and uses Absolute Pressure as WeeWX field pressure. WeeWX fields barometer 
>>> and altimeter are calculated (by WeeWX). The interceptor driver when 
>>> processing Ecowitt format messages does the same, Relative Pressure is 
>>> ignored.
>>>
>>>>
>>>>>

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