Webtags (preserving history): Difference between revisions

There are a set of web tags for 'recent historical data', based on an array stored by Cumulus giving data values from 1 minute ago, up to 1 week ago, in 1 minute intervals. As Cumulus runs it will add the latest values to the array with full resolution, and shift existing values along so those older than 7 days fall off.  

[[#No_Commas]] versions of the array are available for use in script.

(Note that Cumulus uses current time read from the computer to determine which array element it stores each value in. Hence ''when clocks go back'' the value stored for winter time overwrites the value previously stored for same time during summer time for the relevant repeating hour. Hence even if you use 10am for your rollover time in summer, you will not have access to a whole hour worth of data when the clocks change as either the hour has been overwritten or ''when the clocks go forward'' it simply does not exist).