Having issues trying to use a variables, coming from OpenHab

Configuration
,
1

I’ve been fighting with HA to turn off my EV charger when 10kW have been added to save the PV batteries.
I’ve been using openHAB for years but there isn’t a binding for the WallBox charger so I’ve got HA running in a Pi in the garage. In OH it’s this.

var Number Limit

rule "Set Charge Limit"

when
	Item WBSwitch changed to ON
then
	Limit = WBAdded.state + 10
	postUpdate(WBLimit, Limit)
end

rule "Switch off Charger"

when
	Item WBAdded changed
then
	Limit = WBLimit.state
	if (WBAdded.state > Limit) {
		sendCommand(WBSwitch, OFF)
	}
end

I’ve tried automations, variables, helpers. Why is it so difficult to do something that’s so easy in OH?

2

You’re more likely to get prompt assistance if you create a new topic (as opposed to appending to a long dormant topic about variables).

Post whatever automations you have tried (as opposed to OpenHAB code that requires the reader to understand the difference between postUpdate and sendCommand).

3

2 automations and an input_number vs 2 rules and a variable.

input_number:
  number_limit:
    name: Number Limit
    min: 0
    max: 1000000

automation:
- alias: Set Charge Limit
  - trigger:
    - platform: state
      entity_id: switch.wb_switch
      to: 'on'
    action:
    - service: input_number.set_value
      target:
        entity_id: input_number.number_limit
      data:
        value: "{{ states('sensor.wb_added') | float + 10 }}"

- alias: Switch off Charger
  - trigger:
    - platform: state
      entity_id: sensor.wb_added
    condition:
    - condition: template
      value_template: "{{ trigger.to_state.state | float > states('input_number.number_limit') | float }}"
    action:
    - service: switch.turn_off
      target:
        entity_id: switch.wb_switch
4

If the first automation is converted to a Trigger-based Template Sensor, then the Input Number can be eliminated and the solution is reduced to one automation and one Trigger-based Template Sensor.

5

Yes, I wanted to make it comparable though. There’s a number of ways to do this, it’s just different than he expects.

6

in regards to this…

template:
- trigger:
    - platform: state
      entity_id: switch.wb_switch
      to: 'on'
  sensor:
  - name: Number Limit
    state: "{{ states('sensor.wb_added') | float + 10 }}"

automation:
- alias: Switch off Charger
  - trigger:
    - platform: state
      entity_id: sensor.wb_added
    condition:
    - condition: template
      value_template: "{{ trigger.to_state.state | float > states('sensor.number_limit') | float }}"
    action:
    - service: switch.turn_off
      target:
        entity_id: switch.wb_switch