Rules MainUI: But only IF Temperature

Setup, Configuration and Use Beginners
1
  • Platform information:
    *raspi 4b, OH 3.41 in Docker

Would like to run a rule if a temperature value is reached; However, all attempts have so far been unsuccessful;

SYS_WEA_TMP = item type Number:Temperature

UI-CODE:
configuration: {}
triggers:

  • id: “2”
    configuration:
    itemName: SYS_WEA_TMP
    type: core.ItemStateUpdateTrigger
    conditions:
  • inputs: {}
    id: “3”
    configuration:
    itemName: SYS_WEA_TMP
    state: “28.5”
    operator: =
    type: core.ItemStateCondition

or

conditions:

  • inputs: {}
    id: “3”
    configuration:
    itemName: SYS_WEA_TMP
    state: 28.5 C°
    operator: =
    type: core.ItemStateCondition
2

First, “unsuccessful” could mean almost anything. Please describe what’s happening. Does the rule not run? Does it run but do the wrong thing?

If you are dealing with floating point numbers you will almost never have a case where the value is exactly 28.5. It might be 28.49999999999897 or it might be 28.5000000000000012, neither of which is exactly 28.5.

You don’t show what you want to do when this temperature is reached so it’s impossible to say exactly how you should proceed. The most common approach is to use operator >= 28.5 and in the action or additional conditions test to see whether you need to do something or not (e.g. if the action is to turn off a Switch, check to see if it’s already OFF and only command it if it’s not OFF).

3

I don’t know if this is the case here, but comparing temperatures can be tricky. See this;
Working with Number:Temperature Items in rules - Tutorials & Examples - openHAB Community

In my DSL rule I have to use this
var upsetpointnow = (UpstairsThermostat21_SetpointCooling.state as QuantityType<Temperature>).toUnit("°F")

to compare setpoints

4

That isn’t an issue here. In the UI rules you’ll get a warning in the logs if you don’t add units to your number but it will still work.

1 Like
5

Dear, thank you very much for helping.

Yes, I would check within the rules about other conditions. And I change the operator to >= 28.5; so the rule works fine …

but now I get some warnings - if I write value as >= 28.5 C°, so no warnings, but the rule does not start… Why?

configuration: {}
triggers:
  - id: "2"
    configuration:
      itemName: SYS_WEA_TMP
    type: core.ItemStateChangeTrigger
conditions:
  - inputs: {}
    id: "3"
    configuration:
      itemName: SYS_WEA_TMP
      state: "28"
      operator: ">="
    type: core.ItemStateCondition
  - inputs: {}
    id: "5"
    configuration:
      itemName: WDW_ROO_ROOF
      state: OPEN
      operator: =
    type: core.ItemStateCondition
actions:
  - inputs: {}
    id: "4"
    label: RWA-Dachfenster bei hohen Temperaturen nach Lüften schließen
    configuration:
      type: application/javascript;version=ECMAScript-2021
      script: >-
        //WDW_MGT_ROOF_CLOSED: RWA-Dachflächenfenster schließen

        //Bedingungen: bei Dachflächen-Temperatur >= 28 Grad
6

Without the warnings :person_shrugging:

7

I found the error.

not 28,5 C° >> right is: 28,5 °C