Command line sensor => statistic sensor: History purged after 10 days

Configuration
1

In configuration.yaml I have defined:

homeassistant:
  customize: !include customize.yaml
  packages: 
     eh800: !include eh800.yaml

In eh800.yaml I have defined my command line sensors like this:

command_line:
  - sensor:
        name: Ouman EH800 - Delayed room temp measurement
        command: 'curl "http://192.168.1.8/request?S_262_85" | cut -d ''='' -f 2 | cut -d '';'' -f 1'
        unit_of_measurement: "°C"
        unique_id: sensor.ouman_eh800_delayed_room_temp_measurement
        state_class: measurement
        device_class: temperature

Because state_class is defined, sensor can now be recognized e.g. by statistc graph card.

However, it only keeps history of 10 days.

I then tried to define the sensor as this in eh800.yaml:

command_line:
  - sensor:
        name: Ouman EH800 - Delayed room temp measurement
        command: 'curl "http://192.168.1.8/request?S_262_85" | cut -d ''='' -f 2 | cut -d '';'' -f 1'
        unit_of_measurement: "°C"
        unique_id: sensor.ouman_eh800_delayed_room_temp_measurement

…leaving the rest to be defined in customize.yaml (documentation tells to use that for customizations)

sensor.ouman_eh800_delayed_room_temp_measurement:
    state_class: measurement
    device_class: temperature

…with no avail. Still the history is only 10 days.

How to change this behaviour? I need to log these values basically for years

2

Hmmm. When taking a look on my other sensors, they all seem to be having all their history stored - whether they are temperature, humidity, pressure, ESP sensors, or anything, EXECPT these command line sensors.

I have 2 separate Rasp Pi4:s running their own systems, and basically they behave the same.

Both are using mariadb as a recorder, the other one:

recorder:
  db_url: !secret maria_access

and the other:

recorder:
  db_url: !secret maria_access_h
  purge_keep_days: 35

…still the history is stored basically forever in both of these…

Both systems also have influxdb configured like this example:

influxdb:
  host: !secret influxdb_host
  port: !secret influxdb_port
  database: !secret influxdb_database
  username: !secret influxdb_username
  password: !secret influxdb_password
  max_retries: 3
  default_measurement: state

…pretty confused…

3

Any idea:

  • why my other sensors are stored forever, as according to instructions they should be purged after 10 days? (I’m not complaining, that’s OK)
  • why the command line sensors are not stored over 10 days?
  • how can is make my command line sensors to be stored forever

Surely someone knows this stuff?

EDIT: What comes to other sensors showing all the history, I checked these, and they do have state_class defined, which should be enough to make them LTS.

However, the problem to get my command line sensor defined as LTS still stays… Even though they also get state_class defined, they seem not to collect LTS data

EDIT2: This might be a bug and has been reported: command line sensors with state_class set do not collect LTS · Issue #100498 · home-assistant/core · GitHub

Thanks for advice @123