Thermostat that uses light to adjust temperature

Configuration
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1

I created a climate controller in ESPHome (a “Dual-point” thermostat) to control the temperature of the room with AC and Heating hooked up to it. I also want to create a scenario, where the (I’ve purchased a light sensor that measures the lux) light sensor will hit the max threshold (600lux) and (>600lux as the sun is shining through my window) and would immediately turn on the air conditioning system to hit the lower point of the dual point thermostat. I’m not sure though if it can be implemented and just overwriting the climate controller in HA. Any help would be appreciated!

2

Here is my code for turning the AC on

alias: light max threshold AC on
trigger:
  - platform: numeric_state
   entity_id: sensor.lux
   attribute: unit_of_measurement
   above: '600'
condition:
  - condition: state
    entity_id: climate.thermostat_climate_controller
    attribute: target_temp_low
    state: 'ON'
action:
  - service: climate.set_hvac_mode
    data:
       hvac_mode: cool
    target:
       entity_id: climate.thermostat_climate_controller
mode: single

but i don’t know how to return to normal heating/cooling state…:frowning:

3

I would surprised to learn that Numeric State Trigger works the way you expect. You made it monitor the value of the unit_of_measurement attribute which never changes and is not a numeric value.

4

So i have to change it to

alias: light max threshold AC on
trigger:
  - platform: numeric_state
   entity_id: sensor.lux
   above: '600'
condition:
  - condition: state
    entity_id: climate.thermostat_climate_controller
    attribute: target_temp_low
    state: 'ON'
action:
  - service: climate.set_hvac_mode
    data:
       hvac_mode: cool
    target:
       entity_id: climate.thermostat_climate_controller
mode: single

in order to work and add a second automation to return to normal mode?

5

I doubt the State Condition is correct. You made it check if the value of the target_temp_low attribute is ON.

6

I want to achieve ‘target_temp_low’ when i reach 600lux of light. I’m really noob in configuring HA, so my code is not the best as you can see.

7

Is this what you want?

The automation is triggered when the value of sensor.lux increases above the threshold of 600. It then sets the climate entity to cool mode and the setpoint temperature to whatever value is stored in the target_temp_low attribute.

alias: light max threshold AC on
trigger:
  - platform: numeric_state
    entity_id: sensor.lux
    above: 600
condition: []
action:
  - service: climate.set_temperature
    target:
      entity_id: climate.thermostat_climate_controller
    data:
      temperature: "{{ state_attr('climate.thermostat_climate_controller', 'target_temp_low') }}"
      hvac_mode: cool
mode: single
1 Like
8

Thank you! Now I have to come up with how to reverse this to return normal mode.

alias: light min threshold AC off
trigger:
    - platform: numeric_state
      entity_id: sensor.lux
      below: 300
condition: []
action:
   - service: climate.set_hvac_mode
     data:
         hvac_mode: heat_cool
     target:
         entity_id: climate.thermostat_climate_controller
mode: single

Or should i put some condition to mitigate hysteresis? Or to check whether or not the other it’s running.

9

The hysteresis should be handled by the climate.thermostat i forgot…but this would work to return everything to normal state(heat_cool)?