"Statistics sensor" from an "Filter sensor" don't work (unavailable)

Configuration
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1

Hi

I have an:

  1. Sonoff TH16 Temperature and Humidity sensor
  2. An Template sensor over last (1) for accuracy setting if needed
  3. An Filter sensor over last (2) for low/high pass

What I am wanting to do is have statistical sensors defined on the filter sensor (3) to be able to save the minimum/maximum/average values according to different time values.

The problem is that in the statistics, when using the filter sensor (3), I ALWAYS receive “unavailable”.

But if I use the template sensor (2) in the statistics, I immediately begin to have values and they adjust correctly.

My question is enlarged because I have correctly saved the history on the filter (3) since I can use the statistics card on that sensor in lovelace.

I have followed all the new settings defined in: Statistics - Home Assistant

Any idea if it can or am I doing something wrong? It’s Possible to do?

Thanks

Example:

(1)
sonoff:
   sensor: sonoff_123456789

(2)
template:
  - sensor:
     - name: humidity_th16
       unique_id: hum1
       device_class: humidity
       state_class: measurement
       unit_of_measurement: '%'
       state: >
          {{ (states('sensor.sonoff_123456789_humidity')|float(0)*0.98)|round(1) }}

sensor:
(3)
- platform: filter
  name: "FHum1"
  entity_id: sensor.hum1
  filters:
    - filter: lowpass
      time_constant: 20
      precision: 1
(4.a)  DON'T WORK
- platform: statistics
  name: "MAX FHum1 for 24 hours"
  entity_id: sensor.fhum1
  state_characteristic: value_max
  max_age:
    hours: 24
  sampling_size: 200
  precision: 1
(4.b)  WORK OK
- platform: statistics
  name: "MAX Hum1 for 24 hours"
  entity_id: sensor.hum1
  state_characteristic: value_max
  max_age:
    hours: 24
  sampling_size: 200
  precision: 1
2

Is sensor.fhum1 really the entity_id?
Look in Developer Tools / States

3

Yes

Exist and has values.

Is the filtered sensor.

4

The statistics sensor will only update when the input sensor changes. Has sensor.fhum1 changed value?

5

Yes
Pemanently.
Each time that root sonoff sensor change.

6

?

Which is it, a permanent value or a changing one?

The statistics sensor requires the monitored sensor to change, more than once. Or it cannot create an average/max/min.

Can you share the history graph of sensor.fhum1?

7

You asked me “Has sensor.fhum1 changed value?” and I answered “permanently”
It means that the “sensor filter” (FHum1) changes as the temperature/humidity principal sensor reads new values.
This is not the problem, since as I said, so far the 3 sensors (principal, corrected and filtered) take correct values.
The problem comes when I select the “sensor filter” (FHum1) as entity for the statistics sensor.

I also leave you the variation image of FHum1 (sensor filter) using an statistics card in lovelace.
Thanks

FHum1

8

Hi Gabriel, did you ever get this to work?

9

No
Never. :frowning:

10

You should open an issue here if you want it to be fixed:

11
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