Using variable as input for filter

ESPHome
1

Hi, I would like to use a variable or input field the define the value for a filter.
Like in the example shown her for max_value, tried al sorts of things, nothing worked so far.

  - platform: integration
    name: "Battery SOC"
    id: battery_soc
    sensor: wattage_calculated
    integration_method: "left"
    time_unit: h
    restore: true
    device_class: energy
    filters:
        - clamp:            
            max_value: 640
            ignore_out_of_range: true
2 
            max_value: !lambda return id(global_variable);
3

So far as I know, it require float - not templeatable.

Compilation time message as well:

      - clamp: 
          
          expected float.
          max_value: !lambda |-
            return id(global_variable);
4

You can try like this:

sensor:
  - platform: uptime
    type: seconds
    name: Uptime Sensor
    update_interval: 1s
    filters:
      lambda: |-
        if (x < id(max_val).state ) 
            {return x;}
          else
            return {};

number:
  - platform: template
    name: "Template number"
    id: max_val
    optimistic: true
    min_value: 0
    max_value: 300
    initial_value: 20
    step: 1
5

Bummer. I assume you defined the global variable as a float?

6

So i guess it can’t be done?
Maybe something for the WTH what the heck section?

7

You can see at about line 444 here that under the hood ESPHome is doing something similar to my suggestion above. So that would be the workaround.

https://esphome.io/api/sensor_2filter_8cpp_source