The other other variation on Tom's advice to use extensions.py, particularly if you are (still keen on) writing your own driver, is to include the unit group assignments in the driver file. They statements only need to be somewhere where they are executed each time WeeWX starts. If the fields are inextricably linked to the driver having everything in one place can be of benefit. I've used this approach with some of the drivers I have written.
Gary On Saturday, 23 September 2023 at 10:11:16 UTC+10 [email protected] wrote: > Exactly. > > Or, alternatively, you can assign them to appropriate unit groups > <http://www.weewx.com/docs/customizing.htm#Assigning_a_unit_group> in the > file user/extensions.py: > > *import weewx.units* > > *weewx.units.obs_group_dict['signal1'] = 'group_radiation'* > *weewx.units.obs_group_dict['signal2'] = 'group_temperature'* > *weewx.units.obs_group_dict['signal3'] = 'group_radiation'* > > > Then you would not need to specify a format and label. It would also allow > you to do things like > > *The temperature is $current.signal2.degree_C ($current.signal2.degree_F)* > > > to publish the temperature in both ºC and ºF. > > -tk > > On Fri, Sep 22, 2023 at 4:38 PM Craig Young <[email protected]> wrote: > >> Thanks Tom. Signal1 for my station is the signal voltage from a >> pyrgometer. Signal2 is the temperature of the pyrgometer sensor (C) and >> Signal3 is the long wave intensity (W/m2) calculated by the datalogger. So >> if I understand correctly, the weewx engine will pass these values >> untouched through the various services and add to the DB as real numbers. >> I can then deal with them manually when creating the report. >> >> On Saturday, September 23, 2023 at 11:00:54 AM UTC+12 Tom Keffer wrote: >> >>> Signals are for ill-defined measurements. >>> >>> Unit groups exist for two reasons: >>> >>> 1. To pick an appropriate unit for a type of measurement. For >>> example, ºC for temperatures. >>> 2. To pick an appropriate format and label. >>> >>> Signals don't fit neatly into these reasons. They don't take a unit, and >>> it's not obvious what format and what label they should use. So, they were >>> left out of units.py and defaults.py. >>> >>> You can use the signal types without adding them to a unit group. You >>> just won't be able to convert them to a different unit (which they don't >>> have anyway), and there will be no automatic formatting and labelling. If >>> you need a format, use a .format() suffix. If you need a format, just add >>> it on. For example: >>> >>> *$current.signal1.format("%d") widgets* >>> >>> >>> Alternatively, if your signal is actually some kind of counter, you >>> could assign them to group_count. Then they would use "%d" for the format, >>> and an empty string for the label. >>> >>> >>> >>> On Fri, Sep 22, 2023 at 3:22 PM Craig Young <[email protected]> >>> wrote: >>> >>>> In the wview_extended.py schema there is a group of types for signals >>>> (signal1, signal2, .. signal8) and stored in the DB as reals. I looked in >>>> units.py but did not see signals listed. >>>> >>>> On Saturday, September 23, 2023 at 9:40:17 AM UTC+12 Craig Young wrote: >>>> >>>>> What units group do the observation type Signals fall under? Or, if >>>>> I use a signal do I need to update a configuration file to place it into >>>>> a >>>>> units group. >>>>> >>>> -- >>>> 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/b9fa5024-38c9-4d95-8e4b-5c9bb4f0ddb8n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/weewx-user/b9fa5024-38c9-4d95-8e4b-5c9bb4f0ddb8n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >> 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/2dd9fe34-ffde-4e8f-aaf6-b205009b76a7n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/weewx-user/2dd9fe34-ffde-4e8f-aaf6-b205009b76a7n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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/bfef0c77-5e59-4d78-b1a8-f557b0dddaa6n%40googlegroups.com.
