This is a feature request to have the filter sensor restore it’s state and/or previous samples when restarting/reloading. I am not sure if restoring the state is also required to make this work, but I guess so.
Ref.: Lowpass filter "resets" on restart
Example config, even though the specific config values does not matter for the general behavior observed.
filters:
- filter: lowpass
time_constant: 5
precision: 4
A couple of screenshots of current results for the filter sensor with a lowpass filter.
Blue is the lowpass filter, restarts on the red arrows:
