If I understand correctly you are trying to write a WLL driver that not only emits loop packets/archive records but also catchup archive records. if that is the case I think you are making this way more complex than it need be. A driver should only be concerned with emitting loop packets and archive records. These packets/records should be emitted using one of the three unit systems supported by WeeWX; US, METRIC or METRICWX. The driver should not care what unit system is used in the database, WeeWX takes care of any unit conversions before the StdArchive service saves any archive records to database. If the driver is more sophisticated and is able to emit 'catch up' archive records then the driver just neds to implement a genStartupRecords() method. There is no need to create a service to convert or save these (catchup) archive records as during startup WeeWX calls the driver's genStartupRecords() method and any archive records emitted are processed by WeeWX (eg units converted if required by StdConvert) and the archive record saved to database by StdArchive. Note that it is quite acceptable for a driver to convert an observation from one unit to another (say a temperature from C to F) but that should only be done for the purposes of getting the obs in a packet/record in the units used by the chosen unit system not to make the emitted packet/record agree with the database unit system (Note there are functions, largely in weewx.units, that can be imported to do various conversions for you). At the end of the day the driver chooses what unit system to use in packets/records it emits, the driver does not check the database unit system.
Gary On Sunday, 5 July 2020 20:32:51 UTC+10, flor...@pre-vost.fr wrote: > > My service that I created to see the code : > https://github.com/Drealine/WLLDriver/blob/master/bin/user/WLLArchive.py > Le dimanche 5 juillet 2020 à 12:03:36 UTC+2, flor...@pre-vost.fr a écrit : > >> Hi, >> >> How can I pass values from a new service >> http://www.weewx.com/docs/customizing.htm#Adding_a_service ? >> >> I would like to pass packet to Weewx Engine and not by using this method >> that I use at the moment : self.db_manager.addRecord(_packet_wl) >> >> At the moment, I need to convert sensors values relative to target_unit >> in weewx.conf. But I would like that Weewx do it itself. >> > -- 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 weewx-development+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/beaf8b98-ec4e-4c26-a09e-f0eb9ea6171do%40googlegroups.com.
