Homeduino DHT unit/acronym changes?

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I had modified the Arduino firmware to support another sensors like door-contact and PIR. It will count how much the door is opened. Also for PIR detection. The results are shown in the DHT graphics. However the unit and acronym strings are not correct. I tried to modify the config.jon to change these strings.

{
  "id": "homeduino-door_pir1",
  "name": "DHT Garage deur/ Bijkeuken PIR",
  "class": "HomeduinoDHTSensor",
  "type": 22,
  "pin": 10,
  "attributes": [
    {
	  "temperature": [
	    {
          "unit": "#",
          "acronym": "DEUR"
		}
	  ],
	  "humidity": [
	    {
          "unit": "#",
          "acronym": "PIR"
		}
	  ]
    }
  ],
},

Pimatic generates no error and will not recognize these parameters. What is wrong? Or is it not supported by the plug-in Homeduino?

Why do you modify the plugin?

There is a much easier way. Just create 2 variables and count them up with rules.

Add a variables device with those 2 variables in it.

{
      "id": "control-variable",
      "name": "test var",
      "class": "VariablesDevice",
      "variables": [
        {
          "name": "myVar",
          "expression": "$value",
          "type": "number"
        }
      ]
    },

The plug-in itself is not modified. I applied the settings in the config.json. It is not working. Should it be possible or not?

I thought do changed the plug-in because you cant change that data.