Template Switch - Status from Sensor

Configuration
1

Hi, I am trying to set up a switch that only shows that it is on when there is current draw. I am trying to use a template, but the switch is showing as being off even when there is current draw. Here is my code:

switch:
  - platform: template
    switches:
      attic_fan_sense:
        friendly_name: "Attic Fan"
        value_template: "{{ is_state('sensor.attic_fan_current', '! 0') }}"
        icon_template: mdi:fan
        turn_on:
          service: switch.turn_on
          target:
            entity_id: switch.attic_fan
        turn_off:
          service: switch.turn_off
          target:
            entity_id: switch.attic_fan
2

Try this:

value_template: "{{ states('sensor.attic_fan_current')|int(0) != 0 }}"

The way you have it the template is looking for the literal string “! 0”. You can’t do operations inside the state string.

The way I have it above will register as off from +0.9 to -0.9. If that value range is too large you can do this:

value_template: "{{ states('sensor.attic_fan_current')|float(0) != 0 }}"

This will only show as off when the current is actually 0.

One final method for exactly zero:

value_template: "{{ not is_state('sensor.attic_fan_current', '0.00') }}"

Note however that you must match exactly the number of decimals shown for the sensor in Developer Tools → States when the sensor is zero. All states are strings and the string ‘0.00’ does not equal the string ‘0’.

1 Like
3

Worked perfectly. Ty!

1 Like