Create a helper two sensors

Configuration
1

Hello!

I have two lux sensors and I want to create a helper that, if one or both of the sensors have a value below 10, should be true and otherwise false.

I’ve already done that but it doesn’t work. Unfortunately I don’t know why. Does anyone have a tip.

binary_sensor:
  - platform: template
    sensors:
      bewegungsmelder_illuminance_check:
        friendly_name: "Bewegungsmelder Illuminance Check"
        value_template: >-
          {{ states('sensor.bewegungsmelder_1_illuminance_lux')|float < 50 and 
             states('sensor.bewegungsmelder_2_illuminance_lux')|float < 50 }}
        device_class: 'light'
2

Upfront, what you’re using, is the old legacy format, which shouldn’t be used anymore. :slight_smile: But that’s not a problem, here you go:

template:
  - binary_sensor:
      - name: bewegungsmelder_illuminance_check
        state: >
          {{ states('sensor.bewegungsmelder_1_illuminance_lux')|float(0) < 10 or 
             states('sensor.bewegungsmelder_2_illuminance_lux')|float(0) < 10 }}
        device_class: 'light'

This is the basic example, you could additionally set an availability, if you want to. See here:

What I’ve changed:

  • set a default value for the float filter
  • changed the and to an or. If the condition is one or both, the both isn’t needed. :slight_smile:
3

Hello!

Thanks for the answer.

How do I set this up correctly? Helper → Create helper → Template → Create template for a binary sensor

Is that right? Because it just doesn’t work.

4

Sounds about right! :slight_smile: You copy what’s under state and paste it in the field in the UI. But I’m not using the UI, so that might be it. :laughing:

What isn’t working exactly? Is there an error, if so, any log entries?

Please try the state part in your Developer Tools. Let’s see, what’s the outcome. :slight_smile: