Tom, Your information was very useful. I think I have a handle on most things that I am trying to get through. What I am trying to do is to have values for daily lightning strikes, nearest strike (and its time), and latest strike (and its time) available to send to Hubitat (That is the easy part for me).
One thing that i did not see (may of skipped over it) in the wiki page is the time period of a accumulator. It was looking like it was a loop/archive interval, but i found out that happenned to be my data. From reading around it seems that accumulators reset to 0 at midnight. Once I got over that I was able (I think... still waiting on a thunderstorm to check it out) to get a lightning count for the day: lightning_count_start = the min value of strike_count (choose the min versus first incase acurite atlas resets the value during the day for any reason) lightning_count_now = the last value of strike_count lightning_count = lightning_count_now - lightning_count_start then put lightning_count into an accumulator for the last. finding the min and last lightning distance is easy also.... What I can not find any reference on is : Once I have the min lightning distance (or the last) how do I determine the time of that strike? Thanks Patrick On Sunday, August 2, 2026 at 12:33:43 PM UTC-4 Patrick Sifford wrote: > Tom > > Thanks... I think that will help > > I have seen other structures to the Delta functions... Ill give this a > try > > > > On Saturday, August 1, 2026 at 5:45:37 PM UTC-4 Tom Keffer wrote: > >> Accumulators are documented here >> <https://github.com/weewx/weewx/wiki/Accumulators>. >> >> Unfortunately, there is no documentation for deltas, but they are pretty >> simple. If you have some extensive quantity, say "tide", and you want to >> calculate "delta_tide" as the difference in tide between archive >> records, it would look like this: >> >> [StdWXCalculate] >> [[Delta]] >> [[[delta_tide]]] >> input = tide >> >> >> >> >> >> >> On Sat, Aug 1, 2026 at 2:13 PM Patrick Sifford <[email protected]> >> wrote: >> >>> Is there any where a definitive and correct set of documents that >>> discuss how to use deltas and accumulators and their formats? >>> >>> I am trying to work on Acurite Atlas Rain and Lightning sensors and get >>> confused when I read different discussions on the topics. I think the rain >>> is taken care of (somewhere various rain items are calculated (rainToday, >>> rain24, ... ) that I am able to take advantage of. However, I do not seem >>> to find similar items for Lightning. >>> >>> I have also found multiple solutions which do not seem to be >>> solutions... and they all seem to be using different formats of how >>> deltas and accumulator's work. >>> >>> Not looking for the solution ... looking for good reasonable >>> documentation of how these things work to include extractors... >>> >>> Thanks >>> Patrick >>> >>> >>> -- >>> 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/de622fde-796f-43ad-b087-5cc28edaf347n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/weewx-user/de622fde-796f-43ad-b087-5cc28edaf347n%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 visit https://groups.google.com/d/msgid/weewx-user/866a4a31-4737-4e83-a6f7-2496bcb7bd10n%40googlegroups.com.
