[solved]Add a VariablesDevice Could not parse expression

---

hi,

if i add a VariablesDevice. i get the following error and can`t use the Variable.

error [pimatic,VariablesDevice]: Error getting attribute value meldung.myVar1: Could not parse expression

what is the problem?

did you create the variable you are using for the variables device?

@scaleoblack Make sure the expression does not contain extraneous space characters. Presumably that’s causing the error.

Hi,

I wound to use the VariableDevice to show a status on the frondend and set it by a rule.

variables [1]
0 {3}
name : myVar1
expression : $myVar1
type : string
xAttributeOptions [0]
(empty array)
hap {1}
id : meldungen
name : Meldungen
class : VariablesDevice

I don’t have any special characters.

The error also occurs if the given variable is undefined. Make sure you have added a variable “myVar1”!

how i can add a variable? I think the VariablesDevice add the variable?

ok what exactly do you want to do? seems we’re talking about different things?
if using a variables device you are able to show every EXISTING variable on the gui.
so if you are using a variable that does not exist yet, you need to create it at the main menu “variables”

What am I doing wrong? I get a “Error getting attribute value homeduino-update-gui.homeduino-update-gui: Could not parse expression”. In my opinion I followed https://forum.pimatic.org/topic/1502/update-notification-and-changelog-for-pimatic-and-homeduino up to step 4 when the error shows up.

{
      "variables": [
        {
          "name": "homeduino-update-gui",
          "expression": "$homeduino-update-info",
          "type": "string"
        }
      ],
      "xAttributeOptions": [],
      "id": "homeduino-update-gui",
      "name": "Homeduino update info",
      "class": "VariablesDevice"
    }

@Frans said in Add a VariablesDevice Could not parse expression:

What am I doing wrong?

Did you add the variable $homeduino-update-info as described in the previous posts?

In my opinion the variable was created during the creation of the “device” by filling in the “variables”-part. Now I see this is not so!
Thank you its working now and sorry, I had to look better