I’m running two weewx instances as a test. One uses the Davis serial datalogger attached to the old style console and the Vantage driver. The other uses a SDR to sniff the RF and the rtldavis driver.
In a couple wet/windy days testing the NOAA reports are identical for temperature and rain. The wind readings are very similar but not identical, differing by only a fraction of a mph in high speed and average speed and differing slightly in dominant direction. I can look a little deeper with a few days more data, but I don’t see crazy differences here so far. On Tuesday, December 9, 2025 at 12:05:40 AM UTC-8 John Smith wrote: > On Tue, 9 Dec 2025 at 17:44, Danny Ciarniello <[email protected]> > wrote: > >> The issue is not one of units; it's an inconsistency between what the >> Weatherlink console is displaying and what weewx is. >> > > Then what is it? > > >> For example, for the series of speeds that I posted previously, which >> were taken from the console, weewx recorded 0 as the speed. From >> observation, when the console displays a speed between 0 and 1.6kph, weewx >> > > Which could easily be explainable as rounding somewhere... > > >> records 0; for speeds between 1.6 and 3.2 kph, weewx displays 1.6kph, for >> speeds between 3.2 and 4.8kph, >> > > To see 1.6, 3.2 and 4.8km/hr sounds exactly like it's converting from > whole mph readings... > > >> weewx displays 3.2kph and so on. Obviously, if those values are >> converted to mph, the progression is 1mph, 2mph, 3mph which implies that >> for some reason, weewx is only recording speeds in increments of 1mph. A >> complication is that while that is generally what happens, I do >> occasionally see weewx recording wind speeds that are not multiples of >> 1mph. Wind gust, however, is *always* a multiple of 1mph. >> > > As I said, mine always reports whole numbers, but in km/hr, never > fractions... > > >> The rtldavis/weewx-rtldavis and the console are obviously receiving the >> same signal but they are interpreting it differently. >> > > Exactly what I said... What the console shows doesn't have to match the > units of the values in the background... > -- 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 visit https://groups.google.com/d/msgid/weewx-user/72269d7c-c1b6-426d-874c-51fb3d629f7en%40googlegroups.com.
