Re: [weewx-user] Corrections for barometric pressure from TWI station

Doh, thank you!! On Fri, Jan 27, 2023, 14:40 vince wrote: > You want to 'fork' that repo in github, make your changes in your fork > and commit to your forked repo on github, and then you should be able to do > a PR. > > On Friday, January 27, 2023 at 10:17:40 AM UTC-8 pannetron wrote: > >> I'v

Re: [weewx-user] Corrections for barometric pressure from TWI station

You want to 'fork' that repo in github, make your changes in your fork and commit to your forked repo on github, and then you should be able to do a PR. On Friday, January 27, 2023 at 10:17:40 AM UTC-8 pannetron wrote: > I've added and committed my proposed changes to twi.py but I can't push m

Re: [weewx-user] Corrections for barometric pressure from TWI station

I've added and committed my proposed changes to twi.py but I can't push my changes in order to create a PR -- I get this error: remote: Permission to matthewwall/weewx-twi.git denied to <...>; fatal: unable to access 'https://github.com/matthewwall/weewx-twi.git/': The requested URL returned er

Re: [weewx-user] Corrections for barometric pressure from TWI station

I've left my local twi.py reporting what the station reports as "barometer". I'm pretty sure the station actually reports a calculated "altimeter" from its pressure sensor. To review, I calibrated my console to display local pressure adjusted to my altitude. If I let the driver report values

Re: [weewx-user] Corrections for barometric pressure from TWI station

Barometer uses outdoor temperature for correction. Indoor pressure for all practical purposes is the same as outdoor pressure which is determined by the weather. But again, if the algorithm is the same as for the original VP, then the barometer corrections depending on temperature at high alti

Re: [weewx-user] Corrections for barometric pressure from TWI station

Good catch. No, the station has no input for altitude. And I was wrong about setting the tags in twi.py to "altitude" -- that caused issues with the Belchertown skin I use and the value reported to PWSWeather. I changed the tags to "barometer" and things work okay now but I'm left unsure what er

Re: [weewx-user] Corrections for barometric pressure from TWI station

Sounds good. Just a reality check: if your instrument emits altimeter pressure, then there must be a way of setting altitude in the instrument. Hope that's true. On Mon, Jan 9, 2023 at 7:23 AM pannetron wrote: > Update on a revised twi.py. Changing the genLoopPacket "tags" from > "pressure" to

Re: [weewx-user] Corrections for barometric pressure from TWI station

Update on a revised twi.py. Changing the genLoopPacket "tags" from "pressure" to "altimeter" from values parsed from the station reports did the trick. After some previous changes from strings to binary strings, there was a bug with how wind_dir values were parsed so I fixed that, too. Aft

Re: [weewx-user] Corrections for barometric pressure from TWI station

On Sun, Jan 8, 2023 at 4:51 AM Tom Keffer wrote: > 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 rec

Re: [weewx-user] Corrections for barometric pressure from TWI station

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

[weewx-user] Corrections for barometric pressure from TWI station

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 config