It sounds like the TWI instrument is emitting "altimeter" or "barometer", but the driver is labelling it "pressure" (i.e., gauge pressure). So, weewx feels the need to "correct" it to SLP, resulting in your enormous pressures.
I would recommend filing an issue at the TWI repository <https://github.com/matthewwall/weewx-twi>. Expect it to take a while. Matthew is swamped. Or, better yet, do a fork and submit a PR. On Sat, Jan 7, 2023 at 1:25 PM pannetron <pannet...@gmail.com> wrote: > Newbie here, coming from wview, and using a Texas Weather Instruments > station. I've adjusted my console to display -- and report via its serial > port -- an "altimeter" version of my barometric pressure so I can most > easily compare my readings with other stations. Using the default weewx > configuration, it must assume the reported pressure is gauge pressure since > the calculated altimeter reading is up over 41"! At my home's altitude of > 8258', my gauge pressure is around 22.15". It seems that I have two > options for configuring weewx to see my correct barometric pressure. One > is to set the > [StdWXCalculate] like this: > > [[Calculations]] > > pressure = software > altimeter = hardware > barometer = software > > My other option to let weewx assume the pressure my station reports is > gauge pressure and apply a correction offset of approximately -8". Which > option is the preferred method? > > One final question. Since my barometric pressure sensor is indoors in the > console, should the temperature used for corrections be indoor or outdoor > temperature? > > Thanks, Russ. > > -- > 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 weewx-user+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/24d0dfc1-2931-4c53-98e7-38b739954164n%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-user/24d0dfc1-2931-4c53-98e7-38b739954164n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CAPq0zEDOOUY9uOnv6UD%3Dhu5XKob1iwvDPv8001pmO8CZs6TYXQ%40mail.gmail.com.
