I’m using a shelly plug to monitor the power of a Vornado Transom window fan to create fan levels for a template fan and running into a few issues. The fan has 4 levels, which range between ~22W to 29W. While I can see a noticeable difference between the levels, the power drifts enough that I can’t use the raw sensor data from the shelly:
I’ve been experimenting with filters and averages, but I can’t find one that will respond quickly on a level change but also smooth the raw data to prevent false changes. Anyone have any suggestions?
Here is the filter I’m using:
sensor:
- platform: filter
name: "Window Fan Filter"
entity_id: sensor.window_fan_plug_power
filters:
- filter: outlier
window_size: 4
radius: 4.0
- filter: lowpass
time_constant: 10
precision: 2