The issue here is that the ‘co2 field’ receives data only once per hour, so based on a 15 minute archive period only one in four archive records will have co2 data. Changing the accumulator type and extraction policy will not change this. I would leave the co2 accumulator settings out of weewx.conf. I doubt whether $last will be much help either; $last displays data from the last known good record in the database as opposed to the current record used by $current. If there is no co2 data in most records then $last will provide a similar result.
You may have better luck with some sort of aggregate over the past hour, say something like (untested) $span($hour_delta=1).co2.avg. The actual aggregate is probably meaningless since you only have one value per hour so min be mx will work just as well. Gary On Sunday, 5 December 2021 at 03:59:46 UTC+10 [email protected] wrote: > Sorry, here is some info. This time, I re-inserted the [Accumulator] > paragraph at a different place in weewx.conf and it restarted without an > exit. The web data is still showing "$last.co2" > It ran for a while and then stopped. Debug file attached. Thanks > weewx.conf > > # Options for 'MQTTSubscribeService' > [Accumulator] > [[co2]] > accumulator = firstlast > extractor = last > > [MQTTSubscribeService] > # This section is for the MQTTSubscribe service. > > # Turn the service on and off. > # Default is: true > # Only used by the service. > enable = true # false > ================================================== > index.html.tmpl > <tr class = "even"> > <td class="stats_label">105 Crawl Temperature</td> > <td class="stats_data">$current.extraTemp1 / > $current.extraTemp1.degree_C</td> > </tr> > <tr class = "even"> > <td class="stats_label">CO2 level</td> > <td class="stats_data">$last.co2</td> > </tr> > > > ================================================== > > Standard web page reads: (http://grattans.org/wx) > > 105 Crawl Temperature 72.0°F / 22.2°C > CO2 level $last.co2 > > On Saturday, December 4, 2021 at 12:07:09 PM UTC-5 vince wrote: > >> On Saturday, December 4, 2021 at 7:16:00 AM UTC-8 [email protected] wrote: >> >>> I tried changing $current.co2 to $last.co2 but it only printed >>> "$last.co2" on the web page. >>> >>> Adding the [Accumulator] section to weewx.conf only caused an error and >>> exit when I restarted weewx. I tried adding this in several places but none >>> seems to let weewx restart without an exit error. Is there a special place >>> to add this? Couldn't find anything in the doc about placement. Thanks >>> >>> >> Usual answers apply. >> >> Unless you post the error messages verbatim and/or the changes you made >> to the skin, we are not going to be able to help you. >> >> > -- 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/fc7c5ae5-a6f1-418f-9718-904899215131n%40googlegroups.com.
