One of the things HA is good for is detecting things going wrong. Could history be used to log how many times on X day change by 100 Watts (100 is an example) - and keep a counter based on the hour. The history stores lets say for 'Mon/Tues/Wed...' and Hour 0..23. (Saving kwh too!) This history is used to detect current electricity abnormalities. If the current counter is more than historically averaged, then set a Switch saying 'Possibly Bad Pattern' and the user can be alerted. This can detect an iron/hairdryers etc and even detect a fridge malfunctioning. It can be quite useful and simple. -could- (My examples are real). I have done a python/MQTT bits that can do logging (protototypes) but would be awesome if HA could do it
#Simple For energy anomaly detection
hoary karma
mossy willow
this is called outlier detection. There is not an easy way to do that directly in HA but you could write a python script to do it
there is https://www.home-assistant.io/integrations/filter/#outlier for example, but it's more intended for correction
hoary karma
there is https://www.home-assistant.io/integrations/filter/#outlier for example,...
Outlier didnt cut the mustard as I wanted to use a reference day (same day a week ago) - I wrote a C application that used Eventstream - but that sucks! as I am intercepting data that HA already keeps.
I watch for Energy readings changing my 100Watts and then do a COUNTER[CURRENT_HOUR]++ for the current day. Using a reference from the week before and compare. 0% on the chart = SAME. -% is Less that reference and the numbers above are how much higher than ref. At midnight it will create a new reference for use the next week.
Every hour it resets (hence the graph going down -looks like sawtooth) - I done this so that I could add an automation that ignores certain hours (or even days). The aim was to detect devices that use periodic power (iron, fridge, something) increase their cycling and alert
