No, the charts can be easily rebuilt once the underlying data is there. The issue (when going from 1 minute to 5 minutes) is converting the historical data from a 1 minute basis to a 5 minute basis. Say you have five 1 minute readings for outside temperature (outTemp) for 9:01, 9:02, 9:03, 9:04 and 9:05. These values effectively hold the average outTemp seen over that 1 minute period. So to convert to 5 minute data you would need the overall average of these values and that would be recorded as the 9:05 record. It is not a simple case of just keeping every 5th record and dropping the rest. This then has to be done for each observation for each group of 5 records. There are a few other things to do as well but they are fairly straightforward.
Going the other way from 5 minute to 1 minute would arguably need you to make up data (if you have the 9:00 and 9:05 readings how do you get the 9:04 reading?) So all things considered you are best to give your archive period some careful thought when setting up. One final thing, the archive period really just refers to how often weeWX saves the data and how often the reports are run. WeeWX can still capture all the highs and lows and times they occur in between. Gary -- 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]. For more options, visit https://groups.google.com/d/optout.
