Thanks for you answer! Sometimes the solutions is so simple. On Saturday, June 27, 2020 at 3:56:42 AM UTC+2, Tom Keffer wrote: > > This is explained in the guidelines for writing a new driver > <http://www.weewx.com/docs/customizing.htm#Implement_the_driver> in the > Customizing Guide. In particular, the paragraph: > > A couple of observation types are tricky. In particular, rain. Generally, >> WeeWX expects to see a packet with the amount of rain that fell in that >> packet period included as observation rain. It then sums up all the >> values to get the total rainfall and emits that in the archive record. If >> your hardware does not provide this value, you might have to infer it from >> changes in whatever value it provides, for example changes in the daily or >> monthly rainfall. > > > This means you save the first value for daily rain you see, and compare it > to the next value. The field 'rain' is the difference. > > -tk > > On Fri, Jun 26, 2020 at 4:17 PM Bastiaan Meelberg <[email protected] > <javascript:>> wrote: > >> Hi, >> >> I'm working on a Weatherlink Live driver, WLL is giving a daily rain. The >> driver looks for a difference and adds the difference to the loop and sets >> the old value. >> Starting weewxd this counter is set to zero. But if there was rainfall >> all this rain is added again to the loop. >> >> So e.g. if there was 2 mm of rain fell during the day, and after a >> restart, the driver adds this 2 mm to the loop (again), and is seen as new >> rain. >> >> Is there a way to get this daily rain data from the database and set it >> in python as the starting variable? >> >> -- >> You received this message because you are subscribed to the Google Groups >> "weewx-development" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-development/b2d94112-1e1b-4061-bb66-5ab08ce3d444o%40googlegroups.com >> >> <https://groups.google.com/d/msgid/weewx-development/b2d94112-1e1b-4061-bb66-5ab08ce3d444o%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >
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