MQTT sensor RECORDER limit

1

Hi,

One of my tasmotas sends data over mqtt (6 parameters) every second (mosquitto broker installed in my HA).
I’d like to visualize these data in HA however I don’t want to clog my HA.
I’d like to create 6 mqtt sensors (one for every parameter) and somehow limit no. of days to retain in HA.

One of my mqtt sensors:

mqtt:
sensor:    
    - name: "L1"
      state_topic: "stat/sonoff/L1/Voltage"
      unit_of_measurement: "V"
      suggested_display_precision: 1
      value_template: "{{ value }}"


recorder:
  purge_keep_days: 5
  db_url: sqlite:////home/user/.homeassistant/test
  include:
    domains:
      - sensor.L1

is this approach correct?

  1. What does the above recorder configuration do?
  2. Does it ONLY record included sensor L1?
  3. What happens to all of the rest: sensors, switches etc?
    I only want to take care of sensor.L1 (in terms of recording limits), rest of HA records/history is fine.

THX.

2

I cannot make it clearer than the documentation, really:

Note that if you only want sensor.L1, it should be

  include:
    entities:
      - sensor.L1

Domains are “sensor”, “binary_sensor”, light", …