Smart CO2 bottle

Hardware
21 
time:
  - platform: sntp
    # ...
    on_time:

      - seconds: 0
        minutes: 0
        hours: 1
        days_of_week: MON-SUN
        then:
          - take your readings
22

Like this? Sorry, haven’t used this code snipped before.

time:
  - platform: sntp
    # ...
    on_time:

      - seconds: 0
        minutes: 0
        hours: 1
        days_of_week: MON-SUN
        then:
            sensor:
              - platform: hx711
                name: "CO2 Gewicht"
                dout_pin: GPIO4
                clk_pin: GPIO5
                gain: 128
                update_interval: 24h
                unit_of_measurement: "kg"
                icon: mdi:CO2
                accuracy_decimals: 1
                filters:
                  - calibrate_linear:
                      - -226659 -> 0
                      - -98208 -> 6.100
                device_class: weight
23

No way. You can’t create a component inside another component.
Time is one component, sensor is another component.
Your sensor is missing id, set that first
In time component you can set:

 then:
    - component.update: id_of_my_component

and
in sensor component set
update_interval: never