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* Document in DEBUG.md
* for virtual feeds
* Use HTTP API to update tariff data inputs
* More documentation about using stateful timeseries for costs and standing charges * Use PHP DateInterval specifications for standing charge process
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* Tests on PHP7.4 failing due to use of named parameters
* Keep the test happy even though precedence of the operators is explicitly defined in https://www.php.net/manual/en/language.operators.precedence.php
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Making a PHPTimeSeries feed Stateful
The TimeSeries feeds in EmonCMS contain datapoints at irregular time intervals. When used
for graphing the values of those feeds at times within these intervals is usually 'null'
(unless by chance a datapoint exists within the interval). However when such a
TimeSeries represents the state of a system or a tariff cost the value at any point in
time is the most recent datapoint, even if that falls before the interval.
To help solve these two related problems we introduce four new Virtual Feed processes.
See the file STATEFUL_TIMESERIES.md for a full description
With these features you can create feeds that represent point-in-time tariff changes and graph your energy cost over time including standing charges and accurately reflected costs over long periods. There is a small limitation discussed in the document which would require more significant changes to alleviate. This is a start.