Well then this seems to be a big limitation for any Davis station that is not using a WLL! Seems like the WLL is a better solution than other loggers and then ending up with a mess of combined calculated and received values for barometric pressure. Unless it is possible to set things so that Altimeter is only calculated during LOOP2 reads, and to only accept sea level during LOOP1. I'm not sure if that makes sense or if it is even possible, nor what ramifications messing with all this entails nor what the other undesired results may be.
Bottom line....seems like WLL is a better way to get complete live data from the station. On Tuesday, January 12, 2021 at 4:36:03 PM UTC-5 gjr80 wrote: > I have no WLL experience so short answer is I don’t know. > > But the loop_request setting is a vantage driver setting, as far as I know > you need to use a different driver for WLL. Also, there are a number of WLL > drivers; looking at one just now I see it appears to emit pressure and > altimeter, though as I said I don’t know enough about WLL to draw any > conclusions. > > Gary > On Wednesday, 13 January 2021 at 07:22:28 UTC+10 galfert wrote: > >> 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. >>>> >>> -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/1b09ebdc-1524-4d03-b872-3dbb6505797cn%40googlegroups.com.
