The driver reports absolute (aka "gauge", or "station") pressure. The weewx StdWXCalculate service uses that, plus altitude and temperature to calculate the altimeter and SLP pressures.
If you want to see the actual formulas, look in file wxformulas,py, functions altimeter_pressure_US() and sealevel_pressure_US(). Are you sure your absolute pressure is correct? -tk On Tue, Jun 27, 2017 at 1:34 PM, Massimiliano Neri <[email protected]> wrote: > Hello... > > I have a FineOffset (Froggit) WH3080 connected with weewx. I would like to > know how the software calculates the relative pressure from the absolute > pressure. In fact I found that weewx calculates me at least 2hpa more than > the weather stations in my area .... > Can anyone tell me if you can take the relative pressure from the wh3080 > console? > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
