You should create a custom JSON file for your telegrams. You can find more information on this wiki page.
I’ve converted “Innentemperatur” for you as example, but I’ve not tested it! Maybe the pos parameter is wrong. The id should be ventilation.temp_inside
{
"comment": "...",
"device": "Wolf CWL300",
"id": "temp_inside",
"class": "ventilation",
"command": "40 22",
"data": "07",
"dst": "3C",
"values": {
"temp_inside": {"type": "word", "pos": 10, "label": "Innentemperatur", "factor":0.1}
}
},
I hope this will help you to get your wolf ventilation running. You can send me the custom file later on and I can integrate it into the official binding.